Golden Door Properties, LLC v. County of San Diego ( 2020 )


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  • Filed 6/12/20
    CERTIFIED FOR PUBLICATION
    COURT OF APPEAL, FOURTH APPELLATE DISTRICT
    DIVISION ONE
    STATE OF CALIFORNIA
    GOLDEN DOOR PROPERTIES, LLC,                   D075328
    Plaintiff and Respondent,
    v.                                    (Super. Ct. No. 37-2018-0001-
    3324-CU-TT-CTL)
    COUNTY OF SAN DIEGO,
    Defendant and Appellant.
    _____________________________________
    SIERRA CLUB et al.,                            D075478
    Plaintiffs and Respondents,
    v.                                   (Super. Ct. No. 37-2018-0001-
    14081-CU-TT-CTL)
    COUNTY OF SAN DIEGO,
    Defendant and Appellant.
    ____________________________________
    SIERRA CLUB,                                   D075504
    Plaintiff and Respondent,
    v.                                     (Super. Ct. No. 37-2012-00101054-
    CU-TT-CTL)
    COUNTY OF SAN DIEGO,
    Defendant and Appellant.
    CONSOLIDATED APPEALS from judgments and orders of the Superior Court of
    San Diego County, Timothy Taylor, Judge. Affirmed in part, reversed in part, and
    remanded with directions. Requests for judicial notice denied.
    Thomas E. Montgomery, County Counsel and Joshua M. Heinlein, Deputy County
    Counsel; Cox, Castle & Nicholson; Michael H. Zischke and Linda C. Klein, for
    Defendant and Appellant County of San Diego.
    Chatten-Brown, Carstens & Minteer; Jan Chatten-Brown and Joshua R. Chatten-
    Brown for Plaintiffs and Respondents Sierra Club, Center for Biological Diversity,
    Cleveland National Forest Foundation, Climate Action Campaign, Endangered Habitats
    League, Environmental Center of San Diego and Preserve Wild Santee.
    Latham & Watkins; Christopher W. Garrett, Daniel P. Brunton, Taiga Takahashi,
    Samantha K. Seikkula and Diego E. Flores, for Plaintiff and Respondent Golden Door
    Properties, LLC.
    In this CEQA case,1 the County of San Diego (County) challenges a judgment,
    writ of mandate, and injunction directing it to set aside its approvals of a Climate Action
    Plan (2018 CAP or CAP), Guidelines for Determining Significance of Climate Change,
    (Guidelines for Determining Significance), and supplemental environmental impact
    report (SEIR). The primary issue is whether a greenhouse gas (GHG) mitigation measure
    in the SEIR, called M-GHG-1, is CEQA-compliant. Under M-GHG-1, certain projects
    1     California Environmental Quality Act (CEQA), Public Resources Code section
    2100 et seq.
    2
    may mitigate their in-County GHG emissions by purchasing carbon offsets originating
    elsewhere, including internationally.
    Plaintiffs are (1) Sierra Club, Center for Biological Diversity, Cleveland National
    Forest Foundation, Climate Action Campaign, Endangered Habitats League,
    Environmental Center of San Diego, and Preserve Wild Santee (collectively Sierra Club);
    and (2) Golden Door Properties, LLC (Golden Door). Plaintiffs' overarching contention
    is that "[p]roperly restricted and verified offsets can be a valuable GHG mitigation
    strategy, but the offsets in M-GHG-1 provide no such assurances."
    The superior court ordered the County to vacate its approvals of the CAP,
    Guidelines for Determining Significance, and the certification of the SEIR. The court
    also enjoined the County from relying on M-GHG-1 during review of greenhouse gas
    emissions impacts of development proposals on unincorporated County land.
    Our primary holdings are: (1) M-GHG-1 violates CEQA because it contains
    unenforceable performance standards and improperly defers and delegates mitigation.
    (2) The CAP is not inconsistent with the County's General Plan. (3) However, the
    County abused its discretion in approving the CAP because the CAP's projected
    additional greenhouse gas emissions from projects requiring a general plan amendment is
    not supported by substantial evidence. (4) The SEIR violates CEQA because its (a)
    discussion of cumulative impacts ignores foreseeable impacts from probable future
    projects; (b) finding of consistency with the Regional Transportation Plan is not
    supported by substantial evidence; and (c) analysis of alternatives ignores a smart-growth
    alternative.
    3
    To be abundantly clear, our holdings are necessarily limited to the facts of this
    case, and in particular, M-GHG-1. Our decision is not intended to be, and should not be
    construed as blanket prohibition on using carbon offsets—even those originating outside
    of California—to mitigate GHG emissions under CEQA.
    Similarly, our holding regarding the CAP's invalidity is a narrow one. The
    judgment requiring the County to set aside and vacate its approval of the CAP is affirmed
    because the CAP's greenhouse gas emission projections assume effective implementation
    of M-GHG-1, and M-GHG-1 is itself unlawful under CEQA. Except to the extent that
    (1) the CAP is impacted by its reliance on M-GHG-1; and (2) the CAP's inventory of
    greenhouse gases is inconsistent with the SEIR (see part IX, post), the CAP is CEQA-
    compliant.
    This is the third time the County's attempt to adopt a viable climate action plan
    and related CEQA documents has been before this court. In an attempt to avoid a fourth,
    we further note that the CAP contains a GHG reduction measure (T-4.1) designed to
    offset in-County GHG emissions. As explained post, T-4.1 significantly differs from
    M-GHG-1 in several respects and, perhaps more importantly in indicating the types of
    offset protocols that might pass muster, is unchallenged in this litigation.
    FACTUAL BACKGROUND
    A. Overview
    This is a complex case, in part because of the size of the record (approximately
    72,000 pages), and the extensive litigation history, which spans nearly a decade with two
    4
    prior opinions from this court.2 We begin with an overview of some of the key
    documents in the case. Because acronyms are used throughout, a glossary is appended at
    the end of this opinion.
    1. GHG emission reduction
    "Greenhouse gases absorb infrared radiation and trap the heat in the Earth's
    atmosphere, rather than allowing the radiation to escape into space. . . . [¶] Fossil fuel
    combustion is the source of the vast majority of the United States' [GHG] emissions. . . .
    In 2010, California produced 452 million metric tons (MT) of CO2e.[3] The
    transportation sector was the largest contributor to California's [GHG] emissions,
    producing 38 percent of the state's total. . . ." (Irritated 
    Residents, supra
    , 17 Cal.App.5th
    at pp. 731-732.)
    The Legislature has "emphatically established as state policy the achievement of a
    substantial reduction in the emission of gases contributing to global warming." (Center
    for Biological Diversity v. Department of Fish & Wildlife (2015) 
    62 Cal. 4th 204
    , 215
    (Center for Biological Diversity).) This policy is implemented in CEQA.
    2     Sierra Club v. County of San Diego (2014) 
    231 Cal. App. 4th 1152
    (Sierra Club I)
    and Golden Door Properties, LLC v. County of San Diego (2018) 
    27 Cal. App. 5th 892
    (Golden Door).
    3      The capacity of each GHG to retain heat varies. Emissions of GHGs are
    expressed as MTCO2e, which is the amount of carbon dioxide in metric tons that would
    have the same global warming potential as the emission of the particular GHG.
    (Association of Irritated Residents v. Kern County Bd. of Supervisors (2017) 
    17 Cal. App. 5th 708
    , 731, fn. 6 (Irritated Residents).)
    5
    CEQA requires a lead agency to "make a good-faith effort, based to the extent
    possible on scientific and factual data, to describe, calculate or estimate the amount of
    [GHG] emissions resulting from a project." (Cal. Code Regs., tit. 14, § 15064.4, subd.
    (a).)4 In determining the significance of a project's GHG emissions, CEQA directs the
    lead agency to consider, among other things, the "extent to which the project complies
    with regulations or requirements adopted to implement a statewide, regional, or local plan
    for the reduction or mitigation of [GHG] emissions." (Guidelines, § 15064.4, subd.
    (b)(3).)
    The California Air Resources Board (CARB) is "the state agency charged with
    monitoring and regulating sources of emissions of greenhouse gases that cause global
    warming in order to reduce emissions of greenhouse gases." (Health & Saf. Code,5
    § 38510.) CARB has pursued several strategies for reducing GHG emissions, including a
    cap-and-trade program. (Cal. Code Regs., tit. 17, §§ 95801-96022; Association of
    Irritated Residents v. State Air Resources Bd. (2012) 
    206 Cal. App. 4th 1487
    , 1498, fn. 6.)
    2. Cap-and-trade
    " 'Cap-and-trade is a market-based approach to reducing pollution. The "cap"
    creates a limit on the total amount of emissions from a group of regulated sources, and
    4      The CEQA Guidelines in title 14 of the California Code of Regulations, section
    15000 et seq., are hereafter cited as Guidelines. We give them great weight "except
    where they are clearly unauthorized or erroneous." (Center for Biological 
    Diversity, supra
    , 62 Cal.4th at p. 217, fn. 4.)
    5      Undesignated statutory references are to the Health and Safety Code.
    6
    generally imposes no particular emissions limit on any one firm or source.' "
    (Association of Irritated Residents v. State Air Resources 
    Bd., supra
    , 206 Cal.App.4th at
    p. 1498, fn. 6.) " 'The "trade" aspect of a cap-and-trade program creates an incentive for
    businesses to seek out cost-effective reductions, while also encouraging rapid action to
    reduce emissions quickly. Regulated entities receive allowances . . . representing the
    right to emit a ton of greenhouse gas emissions. At specified intervals, regulated
    businesses must surrender an allowance for each ton of GHG . . . they release. Over time,
    the total amount of allowances available to all sources is reduced, meaning overall
    emissions from those sources must be also reduced. If an individual source does not need
    all of the allowances it has in a given period, it may "bank" those allowances to surrender
    later or sell them to another registered party. The ability to sell allowances to other
    businesses that need them creates a market price for pollution reductions and an incentive
    for businesses to achieve the maximum reductions possible at the lowest cost.' " (Ibid.)
    Thus, under cap-and-trade, GHG emitters may comply with the cap by purchasing
    GHG reductions that others achieve, called offsets. Offset credits can be produced by a
    variety of activities that reduce or eliminate GHG emissions or increase carbon
    sequestration.6
    Under cap-and-trade, offset projects must comply with rules and procedures—
    called Compliance Offset Protocols (CARB Protocols), which CARB adopts and
    6      Carbon emissions are sequestered, for example, by trees, which absorb carbon
    from the atmosphere.
    7
    administers through an Offset Project Registry (OPR). (Cal. Code Regs., tit. 17,
    §§ 95973, subd. (a)(1); 95987, subd. (a).) OPRs facilitate "the listing, reporting, and
    verification of offset projects developed using the [Protocols], and issue registry offset
    credits."7 OPRs must be approved by CARB and "shall use [CARB Protocols] to
    determine whether an offset project may be listed . . . for issuance of registry offset
    credits." (Cal. Code Regs., tit. 17, §§ 95986; 95987, subd. (a).) Entities can use offsets
    to fulfill only up to 8 percent of their compliance obligation. (Id., § 95854, subd. (b).)
    GHG offsets "must be real, additional, quantifiable, permanent, verifiable, and
    enforceable." (Cal. Code Regs., tit. 17, § 95802, subd. (a).) Numerous statutes and
    regulations are designed to ensure these criteria are met. (Health & Saf. Code, § 38562;
    Cal. Code Regs., tit. 17, § 95100 et seq.)
    3. The broad contours of this case
    This case involves the County's (1) CAP; (2) associated General Plan Amendment
    to the County's 2011 General Plan Update (GPU); (3) a threshold of significance for
    GHG emissions; and (4) Guidelines for Determining Climate Change—collectively the
    7       (OPR 
    [as of June 12, 2020] archived at ).
    8
    "Project." The County as lead agency prepared the Project's SEIR, which addresses GHG
    impacts in the County's unincorporated areas and from County operations.8
    The superior court determined that the CAP is inconsistent with the GPU and,
    therefore, invalid. The court also determined that M-GHG-1 violates CEQA by
    (1) requiring the purchase of out-of-County offsets without legally sufficient analysis;
    and (2) unlawfully delegating and deferring feasibility findings. The superior court
    further determined that the SEIR violates CEQA by inadequately analyzing
    (a) cumulative GHG impacts; (b) impacts to "energy and environmental justice"; and
    (c) "smart growth mitigation or alternatives for [General Plan Amendment projects]."
    The court also determined that the County violated CEQA by failing to properly respond
    to comments on the draft SEIR (DSEIR).
    Documents discussed throughout this opinion, introduced here and explained in
    more detail later, are:
    (1) 2011 General Plan Update (GPU): A comprehensive, long-
    term plan for developing unincorporated areas of the County. Calls
    for reducing GHG emissions to meet state GHG targets, and requires
    preparation of a Climate Action Plan to achieve this reduction.
    (2) 2011 Program Environmental Impact Report (PEIR):
    Analyzes environmental impacts from implementing the GPU.
    Requires a climate action plan be prepared.
    (3) 2018 Climate Action Plan (2018 CAP or CAP):
    Establishes a baseline inventory of GHG emissions in the
    unincorporated County and from County operations. Projects future
    8     County operations include County facilities and operations located within the
    unincorporated County communities and in the incorporated cities.
    9
    GHG emissions and contains measures to meet state GHG reduction
    targets.
    (4) Guidelines for Determining Significance of Climate
    Change (Significance Guidelines): Contains criteria and a
    checklist to determine a project's consistency with the CAP.
    (5) 2018 Supplemental EIR (SEIR): Analyzes environmental
    impacts from implementing the CAP and contains mitigation
    measures, including M-GHG-1.
    CAP
    PEIR
    GPU                 Analyzes
    Establishes baseline GHG
    inventory in unincorporated
    Calls for reducing          environmental                 County and from County
    GHG emissions to            impacts of the GPU,           operations, projects future
    meet state targets          including GHG                 GHG emissions, contains
    and to prepare a            impacts. Directs              GHG reduction measures to
    Climate Action Plan         preparation of a              meet state targets.
    Climate Action Plan.
    Guidelines For
    SEIR                    Determining
    Analyzes                        Significance
    environmental
    impacts from the             Determines whether
    Climate Action Plan.         projects are
    Includes M-GHG-1.            consistent with the
    Climate Action Plan
    10
    B. The GPU
    The unincorporated County contains 3,570 square miles and as shown in the map
    post, is mostly undeveloped.
    In 2011, the County updated its general plan, establishing "a blueprint for future
    land development projects in the unincorporated County that meets community desires
    and balances the environmental protection goals with the need for housing, agriculture,
    infrastructure, and economic vitality."
    The GPU contains principles guiding future growth that are intended to retain the
    County's "rural character, economy, and unique communities, as well as minimizing the
    environmental impacts of future development." To accomplish these goals, the GPU
    "shifts growth capacity from the eastern backcountry areas to western communities" by
    encouraging growth "in villages with 'compact land development patterns to minimize
    intrusion into agricultural lands and open spaces; reduce travel distances to local services
    11
    and businesses, while also inducing community association, activity, and walking.' " The
    GPU seeks to "develop lands and infrastructure more sustainably in the future."9
    The GPU contains a "Vision Statement" and "Guiding Principles." These
    "represent[] the basis by which all updated plan goals, policies, and implementation
    programs are measured . . . ." Addressing GHG emissions, the Vision Statement
    provides:
    "[T]he Land Use Map provides a mix and density of land uses
    that will minimize automobile trips and their length, invigorate the
    economic health of our businesses, and promote association with our
    neighbors. These, coupled with increased access to transit, will
    reduce our air emissions, greenhouse gas emissions, energy
    consumption, [and] noise . . . ."
    C. Climate Change Legislation
    California's "landmark legislation addressing global climate change, the California
    Global Warming Solutions Act of 2006," is commonly referred to as Assembly Bill
    No. 32 (Assem. Bill No. 32). (Center for Biological 
    Diversity, supra
    , 62 Cal.4th at
    p. 215.) Assem. Bill No. 32 calls for reducing GHG emissions to 1990 levels by 2020.
    (Ibid.)
    In 2016, the Legislature enacted Senate Bill No. 32 (Sen. Bill No. 32), "which
    adopts a goal of reducing [GHG] emissions by 40 percent below 1990 levels by the year
    9      Sustainability means "simultaneously meeting our current economic,
    environmental, and community needs, while also ensuring that we are not jeopardizing
    the ability of future generations to meet their needs."
    12
    2030. This 40 percent reduction is widely acknowledged as a necessary interim target to
    ensure that California meets its longer-range goal of reducing [GHG] emissions to
    80 percent below 1990 levels by the year 2050." (Cleveland National Forest Foundation
    v. San Diego Assn. of Governments (2017) 
    3 Cal. 5th 497
    , 519 (Cleveland National).)10
    These mandates are a key element of the GPU's goals and policies. GPU Goal
    COS-20 (as originally adopted) provides for the "[r]eduction of local GHG emissions
    contributing to climate change that meet or exceed requirements of the Global Warming
    Solutions Act of 2006." Policy COS-20.1 likewise provides that the County shall
    "[p]repare, maintain, and implement a climate action plan with a baseline inventory of
    GHG emissions from all sources; GHG emissions reduction targets and deadlines, and
    enforceable GHG emissions reduction measures."11
    One of the GPU's guiding principles is that "land should be developed more
    compactly, resulting in reduced automobile use and increased use of public transit,
    10     Sierra Club's request for judicial notice of Executive Order No. B-30-15,
    pertaining to the 40 percent reduction target, is denied as irrelevant. (San Diegans for
    Open Government v. San Diego State University Research Foundation (2017) 
    13 Cal. App. 5th 76
    , 90, fn. 8 (SDOG).)
    11      As part of the Project, the County amended COS-20 and COS 20.1 in 2018. COS
    20 as amended provides: "Reduction of community-wide (i.e., unincorporated County)
    and County Operations greenhouse gas emissions contributing to climate change that
    meet or exceed requirements of the Global Warming Solutions Act of 2006, as amended
    by [Sen. Bill No. 32] . . . ." As amended, COS-20.1 provides, "Prepare, maintain, and
    implement a Climate Action Plan for the reduction of community-wide (i.e.,
    unincorporated County) and County Operations greenhouse gas emissions consistent
    with . . . Guidelines Section 15183.5."
    13
    walking, and bicycling. This will result in less consumption of gasoline, generation of
    less air pollution and GHG emissions, the preservation of greater amounts of habitat and
    agricultural lands, and the improvement of the lifestyles and health of community
    residents." The GPU promotes reductions in vehicle trips, gasoline consumption, and
    GHG emissions by containing 41 "mobility strategies."
    D. The PEIR
    The PEIR addresses the environmental impacts from implementing the GPU.12
    The PEIR did not "speculate on the individual environmental impacts of specific future
    development projects," but rather considered "build-out of the General Plan land use
    designations up to forecasted population and housing unit totals."
    Growth consistent with the GPU would create in-County GHG emissions.
    Mitigation measures are necessary to achieve state GHG reduction targets. PEIR
    mitigation measure CC-1.2 requires the County to prepare a climate action plan with
    "comprehensive and enforceable GHG emissions reduction measures" to achieve
    mandated GHG targets.
    The County adopted the GPU and certified the PEIR in August 2011.
    12     A program EIR considers " 'a series of actions that can be characterized as one
    large project and are related . . . .' " (Guidelines, §15168, subd. (a).) This allows the lead
    agency to consider "broad policy alternatives and program wide mitigation
    measures. . . ." (Cleveland National Forest Foundation v. San Diego Assn. of
    Governments (2017) 
    17 Cal. App. 5th 413
    , 425 (Forest Foundation).)
    14
    E. The 2018 CAP
    1. The CAP applies to projects that are consistent with GPU-allowed
    land use
    Broadly speaking, there are two types of development projects in the County. One
    type is a project proposing land use that is completely consistent with that allowed under
    the General Plan. The other type is a project proposing intensity or density of land use
    exceeding that allowed under the General Plan—that is, a project requiring a general plan
    amendment.
    "The scope of the CAP is to serve as mitigation to reduce GHG emissions
    resulting from buildout of the 2011 GPU . . . ." In other words, to the extent a project is
    consistent with land use allowed under the GPU, the project applicant must mitigate
    GHG emissions with CAP GHG reduction measures.
    2. The CAP's GHG inventory
    The CAP establishes a baseline inventory of GHG emissions against which to
    measure future reductions. The baseline consists of GHG emissions from activities
    within the unincorporated County and from County operations as of 2014. Although
    Assem. Bill No. 32 and Sen. Bill No. 32 use 1990 as a benchmark, 2014 is the most
    recent year in which accurate information is available to inventory GHG emissions in the
    unincorporated County. This inventory includes GHG emissions from projects requiring
    a general plan amendment because of increased density or intensity of land use beyond
    that allowed under the GPU (hereafter, such projects are referred to as GPAs), but only if
    the GPA project was constructed as of 2014.
    15
    3. The CAP's GHG projections
    The CAP also projects future GHG emissions for development consistent with
    GPU allowed land use. These projections, based on current trends, population growth,
    and known legislation, are called " 'business-as-usual' " projections. The projections
    assume no additional local GHG reduction efforts and regulations will be undertaken, and
    that population, housing, employment, and transportation will grow consistent with San
    Diego Association of Governments (SANDAG) projections.
    The CAP's GHG projections do not include GPA projects under review, but not
    yet adopted by the County (hereafter referred to as in-process GPAs).13 However, the
    projections include GHG emissions from GPA projects adopted between August 2011
    (the date of the GPU) and August 2017 (the date the DSEIR was publicly released). The
    projections also account for anticipated legislation that will reduce future emissions
    without any additional County action. This includes, for example, anticipated increased
    electric vehicle use.
    The CAP's 2014 baseline and projected GHG emissions in MTCO2e are:
    2014 Baseline         2020 Projection          2030 Projection       2050 Projection
    3,211,505             3,018,671                2,824,049             2,991,507
    13    Such projects are instead analyzed in the cumulative impact analysis in the SEIR,
    where M-GHG-1 applies.
    16
    4. GHG reduction targets and measures
    To meet legislative GHG emission reduction targets, CARB recommends reducing
    emissions to six MTCO2e per capita by year 2030 and to two MTCO2e per capita by
    2050. This is equivalent to reducing 2014 emissions by 40 percent (by 2030) and 77
    percent (by 2050). Therefore, to meet state targets, the County must reduce GHG
    emissions to 1,926,903 MTCO2e by 2030 (40 percent below 2014 levels) and to 738,646
    MTCO2e by 2050 (77 percent below 2014 levels).
    The CAP contains 26 measures intended to meet these targets. "All [26] GHG
    [r]eduction [m]easures in the CAP will be implemented within the unincorporated
    County and from County operations . . . ." Likewise, all CAP GHG reduction measures
    "will achieve GHG reductions locally (i.e., from County operations and within the
    unincorporated County)."
    The County "collaborated with over 50 stakeholder groups in the environmental,
    business, and community sectors during a total of over 100 public events to gather input
    to inform development of strategies and measures for the CAP. The primary determinant
    for whether a measure was chosen was its GHG reduction potential and whether it would
    help the County achieve its GHG reduction target in 2030. Measures were also assessed
    for their applicability and effectiveness in the County's unique rural setting. . . . As
    shown in the CAP, the selected measures are anticipated to meet state targets through
    2030." All of the CAP's reduction measures "would need to be implemented . . . to meet
    the reduction targets."
    17
    CAP measures include, for example, County acquisition of (1) open space, which
    would reduce GHG emissions by preserving land that can otherwise be developed; and
    (2) easements on agricultural land to extinguish future development potential. Under
    another measure, the County will update 15 community plans by 2030, and an additional
    four between 2031 and 2040 to incorporate a balanced approach to housing, jobs,
    services, and infrastructure—including bike lane improvements, shared parking, and
    community centers located in a core area. The CAP measures also include installing
    electric vehicle charging stations, encouraging solar water heater installation, and
    streamlining the permitting of solar energy production.
    The CAP's GHG reduction measures may also produce "co-benefits"—"additional
    jobs and economic development, cleaner air, fewer illnesses and disease, reduced energy
    and water costs, or an overall improvement in the quality of life and public health."
    5. CAP reduction measure T-4.1
    Once implemented, the CAP's suite of measures may require adjustment to stay on
    target. To provide needed flexibility, the CAP includes measure T-4.1, under which the
    County may make "direct investments in local projects to offset carbon emissions."
    "A direct investment project is created when a specific action is taken that reduces,
    avoids, or sequesters GHG emissions." For example, the County could invest in a
    weatherization project that reduces carbon emissions within the county while also
    reducing residents' heating and cooling expenses. Other direct investment projects are
    urban forest and urban tree planting.
    18
    Under T-4.1, the "County will not purchase carbon offset credits . . . but will . . .
    track carbon offsets achieved through County direct investment projects" within the
    unincorporated County. Emissions reductions occur, but unlike in cap-and-trade, offsets
    are not traded as an independent commodity. The SEIR estimates that T-4.1 can achieve
    176,614 MTCO2e reductions by 2030.
    T-4.1 "would be implemented throughout the unincorporated County, where the
    benefits of carbon sequestration and GHG emissions reductions would occur." Direct
    investment projects must comply with (1) "established protocols that have been approved
    by . . . CARB, the California Air Pollution Control Officers Association (CAPCOA), or
    the San Diego County Air Pollution Control District"; (2) "that received 'public review
    prior to adoption' "; and (3) the project must yield GHG reductions that are additional—
    that is, beyond what will occur under business-as-usual operations and reductions not
    otherwise mandated. "Adherence to the protocols ensures that the carbon reductions
    generated by the project are real, permanent, quantifiable, verifiable, and enforceable."
    An independent, qualified third-party must verify the GHG reduction achieved.14
    6. CAP implementation and monitoring
    The County will annually report the CAP's implementation, update the GHG
    emissions inventory every two years, and every five years report findings from these
    updates. "[I]f certain measures have proven successful, additional investment in those
    measures may be made; or, conversely, if certain measures are proving to be more
    14     Plaintiffs do not challenge T-4.1 or any other CAP GHG reduction measure.
    19
    difficult to achieve, then the County may redirect its efforts to other measures to achieve
    overall GHG reduction targets."
    7. Consistency with the CAP is the threshold of significance
    CEQA requires public agencies to conduct an environmental review of
    discretionary projects they approve and to prepare an EIR for any project that may have a
    significant effect on the environment. (Pub. Resources Code, § 21151, subd. (a).) The
    Guidelines encourage public agencies to develop "thresholds of significance" to assist in
    determining whether a project's effect will be deemed significant. (Guidelines,
    § 15064.7.) " 'A threshold of significance is an identifiable quantitative, qualitative or
    performance level of a particular environmental effect, non-compliance with which
    means the effect will normally be determined to be significant by the agency and
    compliance with which means the effect normally will be determined to be less than
    significant.' " (California Building Industry Assn. v. Bay Area Air Quality Management
    Dist. (2016) 
    2 Cal. App. 5th 1067
    , 1072-1073.)
    The Project's threshold of significance for GHG emissions is consistency with the
    CAP:
    "A proposed project would have a less than significant
    cumulatively considerable contribution to climate change impacts if
    it is found to be consistent with the County's Climate Action Plan;
    and, would normally have a cumulatively considerable contribution
    to climate change impacts if it is found to be inconsistent with the
    County's Climate Action Plan."
    20
    Details on how to achieve consistency with the CAP are in a separate document,
    the Guidelines for Determining Significance, which also contains a checklist of CAP
    GHG reduction measures, called the CAP Consistency Review Checklist (Checklist).
    The Checklist implements a two-step process to determine consistency with the
    CAP. The first step assesses whether a project is consistent with growth projections and
    land use assumptions in the GPU. Those assumptions are the basis of the CAP's GHG
    emissions projections.
    Thus, if a project's land use is consistent with the GPU, then its GHG emissions
    are already accounted for in the CAP's projections (because the projections assume
    build-out under the GPU). In that event, the proposed project will achieve GHG
    reduction targets by implementing CAP reduction measures.
    In step two, the project applicant uses the Checklist to itemize and describe how
    the project will implement applicable CAP GHG reduction measures.15 For example,
    applicants for a residential development must indicate on the Checklist whether the
    project will implement electric or alternatively-fueled water heating systems.
    In-process GPAs that the County had not adopted by August 2017 are not included
    in the CAP's GHG projections. Such projects achieve consistency with the CAP under
    M-GHG-1, which we discuss next.
    15     The CAP and Checklist also applies to projects requiring a land use and/or zoning
    amendment to the GPU, but which would result in an equivalent or less GHG-intensive
    project when compared to those allowed under the GPU.
    21
    E. The SEIR and M-GHG-1
    1. The SEIR, in general
    Twenty-one GPAs were in-process as of August 2017. The SEIR acknowledges
    that in-process GPAs are reasonably foreseeable, could result in significant GHG impacts
    and, therefore, are included in the SEIR's cumulative GHG impacts analysis. The SEIR
    also recognizes that these and future GPAs are not accounted for in the CAP and may
    impact the County's ability to meet CAP targets. To the extent in-process and future
    GPAs would increase GHG emissions above projected CAP levels, their impact would be
    significant (i.e., inconsistent with the CAP). The SEIR requires GPAs to use M-GHG-1
    to mitigate GHG emissions to be within the threshold of significance, i.e., to not exceed
    the CAP's GHG emission projections.
    2. M-GHG-1, in general
    M-GHG-1 "requires a project that increases density or intensity [of land use]
    above what is allowed in the [GPU] to mitigate GHG emissions first through all feasible
    onsite design features . . . ." Onsite design features may include "land use and design
    features that reduce VMT [Vehicle Miles Traveled], promote transit oriented
    development, promote street design policies that prioritize transit, biking, and walking,
    and increase low carbon mobility choices, including improved access to viable and
    22
    affordable public transportation . . . ."16 If onsite design features are insufficient to fully
    mitigate GHG emissions, then the project may use offsite mitigation, including in some
    cases purchasing offset credits originating from projects anywhere in the world.17
    Under M-GHG-1, the GPA project may mitigate GHG emissions under either of
    two options: The first is called "No Net Increase." Under this option, "GPA project
    applicants shall achieve no net increase in GHG emissions from additional density above
    the 2011 GPU." For example, "if 400 residential units were allowed under the GPU and
    a GPA proposes 500 residential units, the emissions for the 400 would be mitigated by
    implementing CAP reduction measures, thereby reducing GHG impacts from the 400
    units to below significance. GHG emissions for the 100 additional units must be
    mitigated to zero through "onsite design features and mitigation measures and offsite
    mitigation, including the purchase of carbon offset credits . . . ."
    Option two is called "Net Zero." Under this option, GPA applicants shall reduce
    all project GHG emissions to zero. Applicants shall first demonstrate compliance with
    CAP measures before considering additional feasible onsite design features and
    mitigation measures. Offsite mitigation, including purchase of carbon offset credits,
    16      "Generally, vehicle miles traveled [VMT] is the most appropriate measure of
    transportation impacts. . . . VMT refers to the amount and distance of automobile travel
    attributable to a project." (Guidelines, § 15064.3, subd. (a).)
    17     The text of M-GHG-1 is in Appendix 2 to this opinion.
    23
    would be allowed after all feasible onsite design features and mitigation measures have
    been incorporated.
    Common to both options is the goal to reduce to zero any increases in GHG
    emissions over those projected in the CAP. If that occurs, CAP GHG emission forecasts
    are unaffected by the GPA project. Accordingly, the GPA project would be consistent
    with the CAP, and thus within the threshold of significance for GHG emissions.
    F. CEQA Streamlining
    To avoid repetition, wasted time, and unnecessary speculation, a lead agency may
    "tier" environmental impact reports for a sequence of actions so that later EIRs
    incorporate and build on the information in the previous CEQA document. (Pub.
    Resources Code, §§ 21068.5; 21093, subd. (a).) Projects that are consistent with the
    GPU and implement CAP GHG reduction measures may incorporate by reference the
    CAP's cumulative GHG analysis. Conversely, projects that are consistent with the GPU
    but do not implement CAP GHG reduction measures, as well as GPAs—will require a
    project-level GHG analysis.
    PROCEDURAL HISTORY18
    A. Sierra Club Petition
    After the County certified the SEIR, Sierra Club filed a petition for a writ of
    mandate challenging the County's approval of the CAP, Significance Guidelines,
    18     Procedural history predating the events described here is contained in Sierra Club
    
    I, supra
    , 231 Cal.App.4th at pp. 1156-1163 and Golden 
    Door, supra
    , 27 Cal.App.5th at
    pp. 896-898.
    24
    threshold of significance for GHG emissions, and the SEIR. In the trial court, Sierra
    Club asserted (1) the CAP and SEIR violated CEQA because M-GHG-1 allows
    "in-County emissions from in-process and future GPAs to increase, provided there are
    offsets purchased somewhere in the world, without demonstrating that such offsets will
    be fully enforceable, verifiable, permanent, and additional"; (2) the County "gutted
    Mitigation Measure CC-1.2 by establishing a target of "a mere 2 [percent] reduction in
    emissions within the County from 2014 levels by 2020"; (3) the SEIR fails to analyze the
    CAP's impact on the Regional Transportation Plan/Sustainable Communities Strategy
    (RTP/SCS); (4) the County improperly failed to update its transportation modeling "using
    data that included the recently approved GPAs, all reasonably expected GPAs, and the
    approval of new residential development in far-flung rural areas"; (5) the SEIR failed to
    analyze impacts from increased vehicle miles that would result from allowing "GPA
    applicants to purchase GHG offsets"; (6) the SEIR fails to consider an alternative in
    which "land use classifications and new GPA approvals" comport with and achieve
    certain VMT reduction goals; (7) The SEIR fails to make good faith, reasoned responses
    to public comments; (8) the SEIR fails to analyze environmental justice impacts; and
    (9) the CAP and threshold of significance are inconsistent with the GPU.
    B. Golden Door Petition and Consolidation
    In a separate action, Golden Door sought injunctive and declaratory relief. Golden
    Door alleged that it is the "owner and operator of an award-winning hospitality and
    agricultural operation . . . situated on approximately 600 acres" in San Diego County.
    Golden Door challenged the County's compliance with its General Plan and CEQA "to
    25
    the extent that the County has failed, in its newly adopted CAP, to adhere to requirements
    to achieve 'reduction of community-wide (i.e., unincorporated County) and County
    Operations greenhouse gas emissions' and other legal requirements."
    In the trial court, Golden Door primarily asserted that the County violated CEQA
    (and acted inconsistently with the GPU) by adopting a "program for carbon offset credits
    ('offsets') that would allow in-process and future ['GPAs'] to increase [GHGs] within the
    County, in exchange for the purchase of offsets applicable to elsewhere in the
    world . . . ." Golden Door asserted that the County "did not even attempt to quantify the
    GHGs from the known, in-process GPAs, even though the 2018 CAP Project clearly
    intended the offset program to apply to all GPAs." Golden Door also asserted that the
    County improperly delegated and deferred feasibility findings in M-GHG-1 and failed to
    adequately analyze: (1) VMT and other impacts resulting from implementing M-GHG-1;
    (2) cumulative GHG impacts; (3) energy and environmental justice; and (4) smart growth
    mitigation or alternatives for GPAs. Like Sierra Club, Golden Door also claimed that the
    County failed to adequately respond to comments.
    By stipulation, the trial court consolidated these two cases, along with a third
    (Sierra Club v. County of San Diego, No. 37-2012-00101054-CU-TT-CTL) that had been
    stayed.
    After hearing, the trial court granted an (amended) peremptory writ of mandate,
    ordering the County to set aside its approvals of the CAP, Guidelines for Determining
    Significance, Checklist, certification of the SEIR, and "all attendant approvals in reliance
    thereon . . . ." The trial court also entered a permanent injunction, providing: "During
    26
    review of [GHG] emissions impacts of development proposals on unincorporated County
    lands under CEQA, including in the review of such impacts prior to the issuance of any
    permits or entitlements for any General Plan amendment projects approved after
    February 14, 2018, the County . . . shall not rely on Mitigation Measure M-GHG-1 . . . ."
    Subsequently, the court entered a "final judgment" that also declared "that the February
    2018 Climate Action Plan and the certification of the Final SEIR to the 2011 General
    Plan Update Program EIR are legally inadequate and may not be used to provide the
    basis for CEQA review of GHG impacts of development proposals in the unincorporated
    County."
    C. Appeals and Consolidation
    The County filed a notice of appeal in the consolidated cases from "all judgments
    and orders" including the writ of mandate and the permanent injunction. This court
    consolidated the three appeals.
    DISCUSSION
    I.
    THE CAP IS NOT INCONSISTENT WITH THE GPU
    A. The Trial Court's Ruling
    In the trial court, Plaintiffs asserted that the CAP is inconsistent with the GPU
    because (1) M-GHG-1 is "part and parcel" of the CAP; and (2) the GPU requires
    reducing in-County emissions; however, M-GHG-1 allows purchasing carbon offsets
    "anywhere in the world." Noting the "paucity of offsets available within the County,"
    27
    Sierra Club asserted, "offsets are all but certain to come from outside the County," thus
    violating a prime directive in the GPU.
    The superior court agreed with Plaintiffs, stating, "[T]he County's General Plan
    has consistently . . . stated it required in-County GHG reductions. However, M-GHG-1,
    which is expressly incorporated into the 2018 CAP . . . allows essentially unlimited
    increases in GHG within the County. In this respect, applicants proposing projects in the
    County can meet their GHG mitigation requirements by purchasing offsets from
    anywhere in the world . . . ."
    The County contends the court erred because (1) M-GHG-1 is not a mitigation
    measure of the CAP. Rather, M-GHG-1 is a mitigation measure in the SEIR and only
    applies to GPAs; (2) the CAP is, therefore, not inconsistent with the GPU; and (3) GPAs
    using M-GHG-1 would mitigate GHG emissions to be within CAP projections and,
    therefore, be consistent with the GPU. We agree with the first and second points, and
    find it unnecessary to consider the third in this context.
    B. The Consistency Requirement
    Land use decisions must be consistent with the policies expressed in a general
    plan. (Citizens of Goleta Valley v. Board of Supervisors (1990) 
    52 Cal. 3d 553
    , 570
    (Citizens of Goleta Valley).) This doctrine is " 'the linchpin of California's land use and
    development laws; it is the principle which infused the concept of planned growth with
    the force of law.' " (Corona-Norco Unified School Dist. v. City of Corona (1993) 17
    Cal.App.4th, 994.) However, " 'it is nearly, if not absolutely, impossible for a project to
    be in perfect conformity with each and every policy set forth in the applicable plan. . . .
    28
    It is enough that the proposed project will be compatible with the objectives, policies,
    general land uses and programs specified in the applicable plan.' " (Save Our Heritage
    Organisation v. City of San Diego (2015) 
    237 Cal. App. 4th 163
    , 186.)
    C. The Standard of Review
    Our role is the same as that of the trial court. (Naraghi Lakes Neighborhood
    Preservation Assn. v. City of Modesto (2016) 
    1 Cal. App. 5th 9
    , 19.) Review "is highly
    deferential to the local agency, 'recognizing that "the body which adopted the general
    plan policies in its legislative capacity has unique competence to interpret those policies
    when applying them in its adjudicatory capacity. [Citations.] Because policies in a
    general plan reflect a range of competing interests, the governmental agency must be
    allowed to weigh and balance the plan's policies when applying them, and it has broad
    discretion to construe its policies in light of the plan's purposes. [Citations.] A reviewing
    court's role 'is simply to decide whether the [governing body] officials considered the
    applicable policies and the extent to which the proposed project conforms with those
    policies.' [Citation.]" [Citation.]' " (Friends of Lagoon Valley v. City of Vacaville (2007)
    
    154 Cal. App. 4th 807
    , 816.) "It is, emphatically, not the role of the courts to
    micromanage these development decisions." (Sequoyah Hills Homeowners Assn. v. City
    of Oakland (1993) 
    23 Cal. App. 4th 704
    , 719 (Sequoyah Hills), italics omitted.)
    D. The CAP is Not Inconsistent with the GPU
    The CAP's GHG reduction measures apply only to the extent development is
    consistent with land use allowed under the GPU. In such cases, the project's emissions
    have already been accounted for in the CAP's projections. By incorporating the CAP's
    29
    GHG mitigation measures, a project will reduce its GHG emissions to levels consistent
    with state GHG reduction targets.
    In contrast, M-GHG-1 applies only to "in-process and future" GPAs—that is,
    development involving density or intensity of land use above that allowed under the
    GPU. To the extent such projects exceed CAP emission projections, their emissions are
    not included in the CAP and, therefore, must be mitigated to zero to keep the County on
    track to meet state targets. M-GHG-1 is intended to be that mitigation program. The
    CAP explains this, stating:
    "With incorporation of Mitigation Measure GHG-1, GPAs listed
    in the cumulative impact discussion of the Draft SEIR and all future
    GPAs that propose increased density/intensity above what is allowed
    in the General Plan will comply with the CAP and, therefore, will
    not interfere with the County's 2020 and 2030 GHG reduction
    targets or 2050 goal. General Plan Amendments would, therefore,
    comply with the threshold of significance, which is consistency with
    the CAP."
    Thus, although the CAP refers to M-GHG-1, M-GHG-1 is not one of the CAP's
    GHG reduction measures. Rather, the 26 local measures, none of which involve
    purchasing carbon offsets outside the County—are the heart of the CAP. If the analysis
    were to stop here, we would conclude that the CAP is fully consistent with the GPU
    because the CAP analyzes GHG emissions resulting from buildout under the GPU.
    Moreover, all of the CAP's GHG reduction measures will be implemented locally, thus
    reducing GHG emissions in the County, which is also fully consistent with the GPU.
    However, the CAP is not entirely independent from M-GHG-1. The CAP projects
    future GHG emissions in the County. Those projections exclude emissions from
    30
    in-process GPAs and future GPAs. The CAP's projections exclude these foreseeable
    GHG emissions on the assumption that such projects will mitigate their GHG emissions
    to zero (or net zero) under M-GHG-1. The CAP states:
    "General Plan Amendment projects currently in process . . . have
    not been included in the 2014 GHG . . . projections. . . . GPAs have
    the potential to result in a significant cumulative impact and also
    impact the ability of the County to meet its targets and goal.
    However, Mitigation Measure GHG-1 is provided to reduce the
    cumulative impact to less than significant. In addition, [M-GHG-1]
    would be required for all future GPAs . . . ."
    As noted ante, M-GHG-1 allows mitigating in-County GHG emissions with offset
    credits originating outside the County—even in another country. However, the GPU
    expresses fundamental principles "designed to protect the County's unique and diverse
    natural resources and maintain the character of its rural and semi-rural communities. It
    reflects an environmentally sustainable approach to planning that balances the need for
    adequate infrastructure, housing, and economic vitality, while maintaining and preserving
    each unique community within the County, agricultural areas, and extensive open space."
    (Italics added.) The GPU emphasizes local policies to reduce local GHG emissions:
    "The General Plan takes steps to address the challenging issue of
    climate change by reducing GHG emissions, retaining and
    enhancing natural areas, improving energy efficiency, reducing
    waste, recycling, and managing water use. The General Plan will
    reduce GHG emissions primarily through minimizing vehicle trips
    and approving land use patterns that support increased density in
    areas where there is infrastructure to support it, increased
    opportunities for transit, pedestrians, and bicycles, and through green
    building and land development conservation initiatives. Policies
    also address adaptation to climate change, such as continued wildfire
    management and protection, monitoring flood hazards, and regional
    collaboration on biological preservation, water use and supply, and
    other areas of concern."
    31
    To the extent GPAs emit GHG in the County, but mitigate those impacts by
    reducing emissions elsewhere, the CAP's projection of future GHG emission levels is not
    entirely consistent with the GPU's focus on reducing in-County GHG emissions.19 The
    issue, therefore, is whether this is enough to invalidate the CAP as being inconsistent
    with the GPU.
    A project need not conform perfectly to every general plan policy to be consistent
    with the general plan. (Families Unafraid to Uphold Rural etc. County v. Board of
    Supervisors (1998) 
    62 Cal. App. 4th 1332
    , 1341.) The rule of general plan consistency is
    that the project "must be 'compatible with the objectives, policies, general land uses, and
    programs specified in' " the general plan. (Sequoyah 
    Hills, supra
    , 23 Cal.App.4th at
    pp. 717-718.) "[C]ourts accord great deference to a local governmental agency's
    determination of consistency with its own general plan, recognizing that 'the body which
    adopted the general plan policies in its legislative capacity has unique competence to
    interpret those policies when applying them in its adjudicatory capacity. [Citations.]
    Because policies in a general plan reflect a range of competing interests, the
    governmental agency must be allowed to weigh and balance the plan's policies when
    applying them, and it has broad discretion to construe its policies in light of the plan's
    purposes. [Citations.] A reviewing court's role 'is simply to decide whether the [agency]
    officials considered the applicable policies and the extent to which the proposed project
    19   See post, section II (F) for additional discussion of the impact of M-GHG-1 on the
    CAP.
    32
    conforms with those policies.' " (San Franciscans Upholding the Downtown Plan v. City
    & County of San Francisco (2002) 
    102 Cal. App. 4th 656
    , 677-678.)
    Here, GPU policies must also be construed in light of science. "[T]he global
    scope of climate change and the fact that carbon dioxide and other greenhouse gases,
    once released into the atmosphere, are not contained in the local area of their emission
    means that the impacts to be evaluated are also global rather than local." (Center for
    Biological 
    Diversity, supra
    , 62 Cal.4th at pp. 219-220.) Thus, reducing or eliminating
    GHG emissions anywhere is a benefit.
    Although the CAP is not perfectly in tune with the GPU, and in light of the highly
    deferential standard of review, we conclude the court erred in determining that the CAP
    is inconsistent with GPU policies. A "guiding principle" in the GPU is to "reduce
    greenhouse gas emissions that contribute to climate change." The GPU recognizes that
    the "sources, impacts, and solutions to climate changes are complex." The GPU contains
    a policy to "reduce GHG emissions primarily through minimizing vehicle trips and
    approving [sustainable] land use patterns . . . ." (Italics added.) The GPU provides that
    the "primary opportunities to reduce air quality pollutants and GHG emissions are in the
    urbanized areas of the County where there are land use patterns that can best support the
    increased use of transit and pedestrian activities . . . ." (Italics added.)
    Plaintiffs' argument that the CAP is inconsistent with these goals would require
    replacing "primarily" with "exclusively." Moreover, the CAP is consistent with the GPU
    by providing measures to reduce VMT, recognizing that such measures are necessary to
    achieve the 2030 target. "[P]roposed transportation measures in the CAP focus on
    33
    reducing VMT through improved design of development, infrastructure improvements,
    travel demand management programs, parking code revisions, and alternative fuel use."
    "Several GHG reduction measures focus on reducing the number and length of single-
    occupancy vehicle trips (measures T-1.1, T-1.2, and T-1.3) and expanding alternative
    transportation opportunities (measures T-2.1, T-2.2, T-2.3, and T-2.4)." CAP measure
    T-2.1 reduces VMT by improving roadway segments, intersections, and bikeways to
    encourage pedestrian and cyclist trips. Another reduces VMT by encouraging alternative
    work schedules and telecommuting.
    Additionally, the GPU provides that the CAP shall contain a "baseline inventory"
    of GHG emissions from all sources, GHG emissions reduction targets and deadlines, and
    enforceable GHG emissions reduction measures. The CAP complies by containing
    (1) a baseline inventory, (2) GHG reduction targets and deadlines, and 26 GHG reduction
    measures.
    The GPU also contains a policy to reduce in-County and County operations GHG
    emissions to meet legislative targets. The CAP is consistent with this goal by adopting
    per capita reductions suggested by CARB to meet 2030 and 2050 targets.
    To support a contrary result, Plaintiffs cite Spring Valley Lake Assn. v. City of
    Victorville (2016) 
    248 Cal. App. 4th 91
    . There, a city's general plan required all new
    commercial development to generate electricity onsite to the maximum extent feasible.
    (Id. at p. 98.) The EIR for a proposed Walmart stated the project would be solar ready,
    and should a determination be made in the future that photovoltaic panels can deliver
    power there at a reasonable cost, Walmart and the city would negotiate adding solar
    34
    energy-generating facilities to the project. (Ibid.) On appeal, this court affirmed the trial
    court's finding that the project was not consistent with the general plan because the city
    "effectively found there was no extent to which it would be feasible to require the project
    to generate electricity onsite" and "there is no evidence in the record to support such a
    finding." (Id. at pp. 99-100.) In contrast here, however, the SEIR's finding that
    implementing the CAP would not be inconsistent with the 2011 GPU is supported by
    substantial evidence.
    E. It is Unnecessary to Decide Whether M-GHG-1 Projects Are Consistent
    with the GPU
    In a related argument, Plaintiffs contend that GPAs using M-GHG-1 will be
    inconsistent with the GPU because M-GHG-1 allows in-County emissions to be
    mitigated with out-of-County offsets. It is unnecessary to decide this issue. As explained
    post, M-GHG-1 is not CEQA-compliant. Because M-GHG-1 fails on these grounds, it is
    unnecessary to decide whether M-GHG-1 is invalid for other reasons. (See Communities
    for a Better Environment v. City of Richmond (2010) 
    184 Cal. App. 4th 70
    , 101-102 (CBE)
    [appellate court not required to address additional alleged defects that may be addressed
    in a completely different and more comprehensive manner upon subsequent CEQA
    review following remand].)
    35
    II.
    M-GHG-1 VIOLATES CEQA
    A. The Trial Court's Ruling
    The superior court determined that M-GHG-1 violates CEQA by (1) "allow[ing]
    the use of offsets purchased anywhere on the planet, with no limit on geographic scope or
    duration (and no temporal or cumulative limit)"; (2) containing an "illusory" geographic
    priority because only one offset project exists in the County; and (3) requiring offsets be
    purchased from CARB-approved registries is "not remotely similar to the CARB
    program." Elaborating, the trial court noted that cap-and-trade offsets are generally
    limited to those occurring in the United States and may only be used to meet up to
    8 percent of a participant's annual compliance obligations. However, M-GHG-1 has
    neither limitation. The court also stated there is no evidence that out-of-County offsets
    will be enforceable, verifiable, and of sufficient duration. The court further determined
    that M-GHG-1 lacks "standards or criteria" for achieving the Director's " 'satisfaction' "
    and for determining whether a registry is sufficiently "reputable" to substitute for the
    identified registries.
    B. CEQA Overview
    " 'The foremost principle under CEQA is that the Legislature intended the act "to
    be interpreted in such manner as to afford the fullest possible protection to the
    environment within the reasonable scope of the statutory language.' " [Citations.] 'With
    narrow exceptions, CEQA requires an EIR whenever a public agency proposes to
    approve or to carry out a project that may have a significant effect on the environment.
    36
    [Citations.]' The basic purpose of an EIR is to 'provide public agencies and the public in
    general with detailed information about the effect [that] a proposed project is likely to
    have on the environment; to list ways in which the significant effects of such a project
    might be minimized; and to indicate alternatives to such a project.' [Citations.] 'Because
    the EIR must be certified or rejected by public officials, it is a document of
    accountability. If CEQA is scrupulously followed, the public will know the basis on
    which its responsible officials either approve or reject environmentally significant action,
    and the public, being duly informed, can respond accordingly to action with which it
    disagrees.' [Citation.] The EIR "protects not only the environment but also informed
    self-government.' " (Sierra Club v. County of Fresno (2018) 
    6 Cal. 5th 502
    , 511-512
    (Sierra Club).) " ' "The EIR is the heart of CEQA," and the integrity of the process is
    dependent on the adequacy of the EIR.' " (Rialto Citizens for Responsible Growth v. City
    of Rialto (2012) 
    208 Cal. App. 4th 899
    , 924.)
    C. The Standard of Review
    The parties disagree about the applicable standard of review. The County
    contends the CEQA issues are reviewed for abuse of agency discretion, and that the
    substantial evidence standard governs review of the County's "factual findings,
    conclusions, and determinations." However, citing primarily Sierra 
    Club, supra
    , 
    6 Cal. 5th 502
    , Plaintiffs contend "[d]e novo is the correct standard of review" for the
    CEQA claims.
    The applicable standard of review is more nuanced. "[T]he appellate court
    reviews the agency's action, not the trial court's decision; in that sense appellate judicial
    37
    review under CEQA is de novo." (Vineyard Area Citizens for Responsible Growth, Inc.
    v. City of Rancho Cordova (2007) 
    40 Cal. 4th 412
    , 427.)
    The County's determinations as lead agency are reviewed for abuse of discretion.
    (Sierra 
    Club, supra
    , 6 Cal.5th at p. 512.) " '[A]n agency may abuse its discretion under
    CEQA either by failing to proceed in the manner CEQA provides or by reaching factual
    conclusions unsupported by substantial evidence.' " (Banning Ranch Conservancy v. City
    of Newport Beach (2017) 
    2 Cal. 5th 918
    , 935 (Banning Ranch).)
    And within this abuse of discretion standard, review varies depending on the issue
    involved. " 'While we determine de novo whether the agency has employed the correct
    procedures, "scrupulously enforc[ing] all legislatively mandated CEQA requirements"
    [citation], we accord greater deference to the agency's substantive factual conclusions. In
    reviewing for substantial evidence, the reviewing court "may not set aside an agency's
    approval of an EIR on the ground that an opposite conclusion would have been equally or
    more reasonable," for, on factual questions, our task "is not to weigh conflicting evidence
    and determine who has the better argument." ' " (Sierra 
    Club, supra
    , 6 Cal.5th at p. 512.)
    In Sierra Club, the California Supreme Court summarized these principles as
    follows: (1) An agency has considerable discretion in deciding the manner of discussing
    potentially significant effects in an EIR. (2) However, a reviewing court must determine
    whether that discussion comports with an EIR's intended function. (3) This review is not
    solely a matter of discerning whether there is substantial evidence to support the agency's
    factual conclusions. (Sierra 
    Club, supra
    , 6 Cal.5th at pp. 515-516.) For example, there
    are " 'instances where the agency's discussion of significant project impacts may
    38
    implicate a factual question that makes substantial evidence review appropriate,' such as
    an agency's decision to use a particular methodology. [Citation.] 'But whether a
    description of an environmental impact is insufficient because it lacks analysis or omits
    the magnitude of the impact is not a substantial evidence question.' [Citation.] Where
    the ultimate inquiry is whether an EIR omits material necessary to reasoned
    decisionmaking and informed public participation, the inquiry is predominantly legal and,
    '[a]s such, it is generally subject to independent review.' " (Chico Advocates for a
    Responsible Economy v. City of Chico (2019) 
    40 Cal. App. 5th 839
    , 846-847.)
    "The ultimate inquiry . . . is whether the EIR includes enough detail 'to enable
    those who did not participate in its preparation to understand and to consider
    meaningfully the issues raised by the proposed project.' " (Sierra 
    Club, supra
    , 6 Cal.5th
    at p. 516.) "Generally, that inquiry is a mixed question of law and fact subject to de novo
    review, but to the extent factual questions . . . predominate, a substantial evidence
    standard of review will apply." (South of Market Community Action Network v. City and
    County of San Francisco (2019) 
    33 Cal. App. 5th 321
    , 330-331 (South of Market).) " 'A
    prejudicial abuse of discretion occurs if the failure to include relevant information
    precludes informed decisionmaking and informed public participation, thereby thwarting
    the statutory goals of the EIR process.' " (Id. at p. 331.)
    With these principles in mind, we turn to the CEQA issues.
    39
    D. M-GHG-1 Violates CEQA Because Its Performance Standard
    is Unenforceable
    1. Introduction
    A mitigation measure is a change that would reduce or minimize the project's
    significant adverse environmental impact. (No Slo Transit, Inc. v. City of Long Beach
    (1987) 
    197 Cal. App. 3d 241
    , 256.) " 'Mitigating conditions are not mere expressions of
    hope.' " (Sierra Club 
    I, supra
    , 231 Cal.App.4th at p. 1167.) They must be enforceable
    through permit conditions, agreements, or other legally-binding instruments. (Pub.
    Resources Code, § 21081.6, subd. (b); Guidelines, § 15126.4, subd. (a)(2).)
    Mitigation measures for GHG emissions may include "[o]ffsite measures,
    including offsets that are not otherwise required." (Guidelines, § 15126.4, subd. (c)(3).)
    The parties agree that offsets "can be a valuable GHG mitigation strategy" if "[p]roperly
    restricted" with "verified offsets." However, as the superior court remarked, "the devil is
    in the details."
    Under section 38562, subdivision (d)(1) and (2), cap-and-trade offset credits may
    be issued only if the emission reduction achieved is "real, permanent, quantifiable,
    verifiable, enforceable, and additional to any GHG emission reduction otherwise required
    by law or regulation, and any other GHG emission reduction that otherwise would
    occur."
    " 'Real' means . . . that GHG reductions . . . result from a demonstrable action or
    set of actions, and are quantified using appropriate, accurate, and conservative
    methodologies that account for all GHG emissions sources, GHG sinks, and GHG
    40
    reservoirs within the offset project boundary and account for uncertainty and the potential
    for activity-shifting leakage and market-shifting leakage."20 (Cal. Code Regs., tit. 17,
    § 95802.) " 'Permanent' means . . . that GHG reductions . . . are not reversible, or when
    GHG reductions . . . may be reversible, that mechanisms are in place to replace any
    reversed GHG emission reductions . . . to ensure that all credited reductions endure for at
    least 100 years." (Ibid.) " 'Quantifiable' means . . . the ability to accurately measure and
    calculate GHG reductions . . . relative to a project baseline in a reliable and replicable
    manner for all GHG emission sources . . . ." (Ibid.) " 'Verifiable' means that an Offset
    Project Data Report assertion is well documented and transparent such that it lends itself
    to an objective review by an accredited verification body." (Ibid.) " 'Additional'
    means . . . greenhouse gas emission reductions or removals that exceed any greenhouse
    gas reduction or removals otherwise required by law, regulation or legally binding
    mandate, and that exceed any greenhouse gas reductions or removals that would
    otherwise occur in a conservative business-as-usual scenario." (Cal. Code Regs., tit. 17,
    § 95802.)
    20     GHG sink means "a physical unit or process that removes a GHG from the
    atmosphere." (Cal. Code Regs., tit. 17, § 95802.) GHG reservoir means "a physical unit
    or component of the biosphere, geosphere, or hydrosphere with the capability to store,
    accumulate, or release a GHG removed from the atmosphere by a GHG sink or a GHG
    captured from a GHG emission source." (Ibid.) Leakage is an unintended increase in
    GHG emissions caused by a project. " 'Market-shifting leakage,' in the context of an
    offset project, means increased GHG emissions or decreased GHG removals outside an
    offset project's boundary due to the effects of an offset project on an established market
    for goods or services." (Id., § 95102.)
    41
    The text of M-GHG-1 incorporates section 38562, subdivision (d)(1) by reference
    by stating, "Carbon offset credits must be purchased through [certain named registries or
    through] . . . any other reputable registry or entity that issues carbon offsets consistent
    with . . . section 38562(d)(1) . . . ."21 Moreover, to demonstrate that M-GHG-1 is
    CEQA-compliant, the County invites comparison between M-GHG-1 and CARB-issued
    offset credits under cap-and-trade. Although conceding at oral argument that there are
    "some differences" between cap-and-trade offset credits and offset credits under
    M-GHG-1, the County contends cap-and-trade and M-GHG-1 are "substantially similar."
    Specifically, the County asserts that M-GHG-1 will be "effective and enforceable"
    because M-GHG-1 requires offsets to be purchased from registries that "meet the
    stringent requirements of . . . section 38562, subdivision (d)(1)."
    Accordingly, we compare and contrast the "stringent requirements" in M-GHG-1
    with those governing CARB offset credits under cap-and-trade.
    2. Cap-and-trade offset protocols
    The value of any offset depends on whether GHG emission reduction has
    occurred. "[U]nlike the produce at the farmer's market, we can't examine the [GHG
    offset] product to determine its value. Not only are emission reductions invisible, they
    actually didn't happen. So to have confidence in their value, we need a reliable and
    accurate picture of what would have happened, as well as what actually happened."
    21     The County asserts that CEQA does not "import Health and Safety Code standards
    for Assem. Bill No. 32 . . ." It is unnecessary to address that issue because M-GHG-1
    self-imposes these requirements.
    42
    (California Air Pollution Control Officers Association, Quantifying Greenhouse Gas
    Mitigation Measures (2010), p. 22 (CAPCOA Quantifying), italics in original.)
    "Protocols are the formalized procedures for accounting for credits that ensure the
    credits are an accurate and reliable representation of emission reductions that actually
    occurred." (CAPCOA 
    Quantifying, supra
    , at p. 22.) Protocols " 'qualify and quantify
    GHG destruction, ongoing GHG reductions or GHG removal enhancements achieved by
    an offset project.' " (Our Children's Earth Foundation v. State Air Resources Bd. (2015)
    
    234 Cal. App. 4th 870
    , 879 (Our Children's).)
    Under cap-and-trade, an offset project must use a CARB-approved "Compliance
    Offset Protocol" (CARB Protocol). (Cal. Code Regs., tit. 17, § 95973, subd. (a)(1).)
    CARB Protocols are designed to "ensure that the reductions are quantified accurately,
    represent real GHG emissions reduction, and are not double-counted within the system."
    More specifically, a CARB Protocol must:
    "(1) Accurately determine the extent to which GHG emission
    reductions and GHG removal enhancements are achieved by the
    offset project type;
    "(2) Establish data collection and monitoring procedures relevant
    to the type of GHG emissions sources, GHG sinks, and GHG
    reservoirs for that offset project type[];
    "(3) Establish a project baseline that reflects a conservative
    estimate of business-as-usual performance or practices for the offset
    project type;
    "(4) Account for activity-shifting leakage and market-shifting
    leakage for the offset project type, unless the Compliance Offset
    Protocol stipulates eligibility conditions for use of the Compliance
    Offset Protocol that eliminate the risk of activity-shifting and/or
    market-shifting leakage;
    43
    "(5) Account for any uncertainty in quantification factors for the
    offset project type;
    "(6) Ensure GHG emission reductions and GHG removal
    enhancements are permanent;
    "(7) Include a mechanism to ensure permanence of GHG
    removal enhancements for sequestration offset project types;
    "(8) Establish the length of the crediting period pursuant to
    [California Code of Regulations, title 17,] section 95972[,
    subdivision] (b) for the relevant offset project type; and
    "(9) Establish the eligibility and additionality of projects using
    standard criteria, and quantify GHG reductions and GHG removal
    enhancements using standardized baseline assumptions, emission
    factors, and monitoring methods." (Cal. Code Regs., tit. 17,
    § 95972.)
    A CARB Protocol must also specify the project's geographic boundary.
    Generally, that boundary must be within the United States or its territories. (Cal. Code
    Regs., tit. 17, § 95972, subd. (c).)22 Also, the project must employ procedures specified
    in the CARB Protocol "for monitoring measurements and project performance . . . ." (Id.,
    § 95976, subd. (a).)
    There are currently six CARB Protocols. (Cal. Code Regs., tit. 17, § 95975,
    subd. (e).) Each is from a distinct economic sector outside the coverage of cap-and-trade.
    (Ibid.) For example, the livestock protocol authorizes offset credits for projects that
    reduce methane emissions. (Our 
    Children's, supra
    , 234 Cal.App.4th at p. 880.)
    22    In this respect, the County's assertion at oral argument that cap-and-trade has no
    "geographic preferences" is incorrect.
    44
    Cap-and-trade offsets must also be additional. This means that the offset project
    must "exceed any [GHG] reduction or removals otherwise required by law, regulation, or
    legally binding mandate." The offset must also exceed what would have otherwise
    occurred "in a conservative business-as-usual scenario." (Health & Saf. Code, § 38562,
    subd. (d)(1) & (2); Cal. Code. Regs., tit. 17, § 95802, subd. (a)(4).)23 For example, the
    ozone depleting substances protocol excludes destruction of such substances by the
    United States government because such " 'is common practice and considered business-
    as-usual. . . .' " (Our 
    Children's, supra
    , 234 Cal.App.4th at p. 881.)
    A CARB Protocol must " '[e]stablish [] the eligibility and additionality of projects
    using standard criteria, and quantif[y] GHG reductions and GHG removal enhancements
    using standardized baseline assumptions, emission factors, and monitoring methods.'
    [Citation.] Furthermore, a specific project may qualify for an offset credit only by
    meeting both the additionality requirements set forth in the regulation and any
    additionality requirements in the applicable [CARB] [P]rotocol." (Our 
    Children's, supra
    ,
    234 Cal.App.4th at p. 878.)
    23      " 'Conservative' means . . . utilizing project baseline assumptions, emission factors,
    and methodologies that are more likely than not to understate net GHG reductions or
    GHG removal enhancements for an offset project to address uncertainties affecting the
    calculation or measurement of GHG reductions or GHG removal enhancements." (Cal.
    Code Regs., tit. 17, § 95802, subd. (a)(77).) " 'Business-as-Usual Scenario' means the set
    of conditions reasonably expected to occur within the offset project boundary in the
    absence of the financial incentives provided by offset credits, taking into account all
    current laws and regulations, as well as current economic and technological trends.' "
    (Id., subd. (a)(43).)
    45
    CARB Protocols are regulatory documents. Therefore, CARB must "provide
    public notice of and opportunity for public comment prior to approving any [CARB]
    Protocols . . . ." (Cal. Code Regs., tit. 17, § 95971, subd. (a).)
    After issuing offset credits, CARB may invalidate them if newly discovered
    information shows the Protocol was noncompliant. (Cal. Code Regs., tit. 17, § 95985,
    subd. (c).)
    Offset projects in foreign countries present additional concerns. "With domestic
    offsets, the offset developer and capped source purchaser are within [CARB's]
    jurisdiction. Regulations have been adopted that assure that if an offset is false, fails or
    otherwise is inadequate that [CARB] can take enforcement action.' [CARB] can rely
    upon existing monitoring, inspections and other tools that an enforcement agency has
    available to it. An international offset in a developing country is inevitably dependent
    upon the host country or third parties to validate the activities giving rise to the offset.
    Corruption at any stage in the development of the offset, from the initial reporting to the
    verification and monitoring will undermine the offset." (Alan Ramo, The California
    Offset Game: Who Wins and Who Loses, 20 Hastings W.-Nw. J. Envt'l L. & Pol'y 109,
    147 (2014) (Ramo Offset).)
    California's cap-and-trade program includes several additional requirements for
    out-of-state and foreign offsets. This process is called "linkage." (Gov. Code, § 12894,
    subd. (e).)
    Before linking with another jurisdiction's offset program, CARB must notify the
    Governor, who has 45 days in which to consider advice from the Attorney General, and
    46
    make (or decline to make) the following findings that are submitted to the Legislature:
    (1) The other jurisdiction's GHG emissions program must be "equivalent to or stricter
    than" California's program; (2) California must retain the ability to enforce Assem. Bill
    No. 32 requirements against any entity subject to regulation under those statutes, and
    against any entity located within the other jurisdiction to the maximum extent permitted
    under the United States and California Constitutions; (3) the other jurisdiction must have
    equivalent or stricter enforcement powers; and (4) the proposed linkage does not impose
    any liability on California. (Gov. Code, § 12894, subds. (f) & (g).)24
    3. Registries
    An Offset Project Registry (Registry) is "an entity that . . . is approved by [C]ARB
    that lists offset projects, collects Offset Project Data Reports, facilitates verification of
    Offset Project Data Reports, and issues registry offset credits for projects being
    implemented using a CARB Protocol." (Cal. Code Regs., tit. 17, § 95802.) However, to
    obtain a CARB offset credit, it is not enough for a Registry to issue credit. CARB alone
    determines whether a registry offset qualifies as a compliance instrument. (Id., §§ 95802
    [defining registry offset credit], 95981.1 [process for issuing CARB offset credits].)
    4. M-GHG-1 is not equivalent to cap-and-trade offsets
    The County contends that M-GHG-1 is "substantially similar" to the offset
    program authorized under cap-and-trade. Specifically, the County asserts that like offsets
    24    Sierra Club's request for judicial notice of CARB's website discussing linkage is
    denied as irrelevant. 
    (SDOG, supra
    , 13 Cal.App.5th at p. 90, fn. 8.)
    47
    under cap-and-trade, M-GHG-1 requires offsets "be purchased from a registry approved
    by [C]ARB or one that meets section 38562[, subdivision (d)(1)]." The County argues
    that this is a "sufficient safeguard[]" to "ensure credits purchased pursuant to M-GHG-1
    are real, permanent, verifiable, and enforceable."
    However, M-GHG-1 is materially different from Assem. Bill No. 32 compliant
    cap-and-trade offsets in several key respects. Under M-GHG-1, offsets must be
    purchased through "(i) a CARB-approved registry, such as the Climate Action Reserve,
    the American Carbon Registry, and the Verified Carbon Standard, (ii) any registry
    approved by CARB to act as a registry under the state's cap-and-trade program,
    (iii) through the CAPCOA GHG Rx and SDAPCD, or (iv) if no registry is in existence as
    identified . . . above, then any other reputable registry or entity that issues carbon offsets
    consistent with . . . section 38562 [subdivision] (d)(1), to the satisfaction of the
    Director . . . ."25 At oral argument, the County explained that it is "through the use of
    those registries that the protocol gets applied." But M-GHG-1 says nothing about the
    protocols that the identified registries must implement. Therefore, implicit in the
    County's argument is that if the registry administering the offset is CARB-approved, then
    for that reason alone, necessarily the GHG emissions reduction protocol administered by
    that agency is also Assem. Bill No. 32 compliant, thereby ensuring the validity of the
    offset credit claimed. However, this assumption is incorrect.
    25    CAPCOA GHG Rx is the California Air Pollution Control Officers Association
    Greenhouse Gas Reduction Exchange. APCD is the Air Pollution Control District.
    48
    Unlike M-GHG-1, under cap-and-trade, it is not enough that the registry be
    CARB-approved. Equally important, the protocol itself must be CARB-approved. (Cal.
    Code Regs., tit. 17, § 95970, subd. (a)(1) & (2).)26 This distinction is significant because
    some offset protocols administered by CARB-approved registries are not Assem. Bill No.
    32 compliant. Indeed, CARB has stated that offset protocols developed by CARB-
    approved registries (including registries named in M-GHG-1) do not by that fact alone
    meet the offset criteria in Assem. Bill No. 32:
    "Voluntary offset programs such as the American Carbon
    Registry, Climate Action Reserve, Verified Carbon Standard, and
    others may submit protocols to [C]ARB for review. However,
    regardless of how the voluntary protocols are developed, [C]ARB
    staff must determine whether the voluntary protocol should be
    developed for use in the Cap-and-Trade Program and if so, to
    conduct its own rulemaking process under the Administrative
    Procedure Act. . . . This process ensures that any voluntary
    protocol . . . demonstrates the resulting reductions meet the offset
    criteria in [Assem. Bill No. 32] . . . .
    "Protocols developed by the voluntary programs are not
    Compliance Offset Protocols as they are not developed through a
    rulemaking process, may not meet the [Assem. Bill No. 32] and Cap-
    and-Trade Regulation criteria, and were not approved by [CARB]."
    (Italics added.)
    Furthermore, before approving a protocol, CARB subjects the proposed offset
    protocol to public notice, a comment period, and a public hearing. (Cal. Code Regs.,
    tit. 17, §§ 95970, subd. (a)(2), 95971, subd. (a).) CARB also requires that emission
    reductions for offset credit be from sources not already covered by cap-and-trade. For
    26    "A registry offset credit must . . . [r]esult from the use of a Compliance Offset
    Protocol . . . ." (Cal. Code Regs., tit. 17, § 95970, subd. (a)(2).)
    49
    example, CARB would not approve an offset protocol for installing solar panels because
    electricity generation is already covered under cap-and-trade.
    The CARB Protocols are the heart of cap-and-trade offsets—but the word
    "protocol" is not even mentioned in M-GHG-1. Contrary to the County's contention,
    M-GHG-1 is not equivalent to cap-and-trade offset programs because M-GHG-1 does not
    require the protocol itself to be consistent with CARB requirements under title 17, section
    95972, subdivision (a)(1)-(9) of the California Code of Regulations, quoted ante. For
    example, CARB will not approve a protocol unless its GHG reductions are permanent.
    (Id., § 95970, subd. (a)(1).) If the project is to sequester carbon (e.g., planting trees), the
    protocol must ensure that the GHG will not be released for 100 years. M-GHG-1 is
    deficient because it has no such safeguards.
    Under cap-and-trade, legislative safeguards seek to ensure that out-of-state offsets
    reflect genuine GHG reductions. For example, CARB may approve out-of-state offsets
    only if the Governor makes findings to ensure the linked jurisdiction's offsets are
    genuine, verifiable, and enforceable under law that is at least as strict and enforceable as
    is California law. (Gov. Code, § 12894, subd. (f).) However, M-GHG-1 has no such
    restrictions. The only M-GHG-1 limit on mitigating with international offsets is the
    Director's unilateral decision that offsets are not feasibly available within (1) the
    unincorporated county; (2) the County; (3) California; and (4) the United States. The
    fundamental problem, unaddressed by M-GHG-1, is that the County has no enforcement
    authority in another state, much less in a foreign country. M-GHG-1 does not require a
    50
    finding that an out-of-state offset site has laws at least as strict as California's with respect
    to ensuring the validity of offsets.
    At oral argument, the County asserted that the "registries" would be the County's
    enforcement mechanism to ensure the validity of offsets originating in foreign countries.
    This argument fails, however, because it is premised on the assumption that the registry's
    protocol is Assem. Bill No. 32 compliant—and as explained ante, M-GHG-1 does not
    require use of an Assem. Bill No. 32 compliant protocol.
    Moreover, nothing other than the Director's determination of feasibility limits a
    GPA applicant from obtaining up to 100 percent of its GHG emission reductions through
    M-GHG-1 offsets. This includes offset projects occurring anywhere in the world. In
    sharp contrast, cap-and-trade offsets cannot exceed 8 percent of an entity's entire
    compliance obligation. (Cal. Code Regs., tit. 17, § 95854, subd. (b).)27
    The relative ease with which GPAs might obtain offset credits originating in
    foreign countries under M-GHG-1 is particularly concerning because "[i]n a developing
    country where one relies upon records that may not exist, and testing technology that may
    be inadequate or fraudulent, it can be difficult if not impossible" to verify GHG
    reductions. (Ramo 
    Offset, supra
    , 20 Hastings W.-Nw. J. Envt'l L. & Pol'y at p. 121.)
    "Beyond these challenges is the issue of what would have happened anyway. A
    developing country is so named because it is economically underdeveloped and is
    27     We express no opinion on whether 8 percent is also the CEQA limit. That issue is
    not before us.
    51
    hopefully making economic and social progress. In that climate, how does one
    distinguish between an emission reduction that would have happened anyway and one
    that is happening only or in part because of the encouragement of the offset program and
    the potential to sell a credit for a profit?" (Ibid.) "Corruption also presents
    challenges . . . . [As of 2011], [t]here [were] . . . carbon reduction projects either certified
    or under development in Ethiopia, Nicaragua, the Philippines, Kenya, and Venezuela.
    Yet, Transparency International's Global Corruption Report 2009 rates Ethiopia as the
    126th most corrupt country out of 180 countries, Nicaragua as the 134th, the Philippines
    as the 141st, Kenya as the 147th, and Venezuela as the 158th." (Brian Joseph McFarland,
    Carbon Reduction Projects and the Concept of Additionality (2011) 11 Sustainable Dev.
    L. & Pol'y 15, 16 (McFarland), fn. omitted.)
    There is another significant deficiency in M-GHG-1. Under cap-and-trade, GHG
    emission reductions must be additional "to any greenhouse gas emission reduction
    otherwise required by law or regulation, and any other greenhouse gas emission reduction
    that otherwise would occur." (§ 38562, subd. (d)(2).) "Additionality is an important
    requirement because if non-additional (i.e., 'business-as-usual') projects are eligible for
    carbon [offset] . . . then the net amount of greenhouse gas emissions will continue to
    increase and the environmental integrity of carbon reduction projects will be called into
    question." 
    (McFarland, supra
    , 11 Sustainable Dev. L. & Pol'y at p. 15.) For example,
    CARB will not approve a protocol that "includes technology or GHG abatement practices
    that are already widely used." Moreover, "[t]o assess if a specific GHG mitigation
    method may have 'otherwise occurred,' " CARB will determine "if that method is
    52
    common practice in the geographic area in which the proposed [CARB Protocol] is
    applicable."
    Although additionality is "a critical component of any environmental market" it is
    "often seen as expensive [and] onerous. . . ." (Karen Bennett, Additionality: The Next
    Step for Ecosystem Service Markets (2010) 20 Duke Envt'l. L. & Pol'y F. 417, 419.)
    Perhaps this explains why M-GHG-1 seemingly goes out of its way to not require
    additionality.
    Under M-GHG-1, the Director may approve offsets issued by any "reputable
    registry or entity that issues carbon offsets consistent with . . . section 38562[,
    subdivision] (d)(1)." The County asserts this reference to section 38562 ensures that
    offset protocols administered under M-GHG-1 will be substantially similar to Assem. Bill
    No. 32 compliant offsets. However, subdivision (d)(1) of section 38562 does not require
    that offsets be additional. Additionality is required under the next subdivision [(d)(2)] in
    section 38562, which provides in part:
    "Any regulation adopted by [CARB] . . . shall ensure all of the
    following: [¶] . . . [¶] (2) . . . the reduction is in addition to any
    greenhouse gas emission reduction otherwise required by law or
    regulation, and any other greenhouse gas emission reduction that
    otherwise would occur." (§ 38562, subd. (d)(2).)
    Although M-GHG-1 cites subdivision (d)(1) of section 38562, it is silent with
    respect to subdivision (d)(2). And there is nothing else in M-GHG-1's text that requires
    53
    additionality.28 At oral argument, when asked to identify the language in M-GHG-1 that
    requires "additionality," the County's lawyer cited a portion of the SEIR that states, "One
    carbon offset credit represents the past reduction or sequestration of one metric ton of
    carbon dioxide equivalent that is 'not otherwise required' (CEQA Guidelines section
    15126.4 [subdivision] (c)(3))." (Italics added.) Later, however, counsel correctly
    conceded that "not otherwise required" is not in the text of M-GHG-1. Rather, it is in a
    prefatory section of the SEIR about greenhouse gas emissions, prior to the text of
    M-GHG-1 itself.
    In comments to the DSEIR, Golden Door's attorneys called the County's attention
    to these problems. In response, the County did not claim that additionality was not
    required. Rather, the County asserted that M-GHG-1 offsets would be additional by
    "adher[ing] to the applicable protocol, as detailed in SEIR Appendix B." In its reply
    brief, the County makes the same assertion, stating: "Appendix B to the SEIR contains
    nearly 3,000 pages of offset protocols that the registries listed in M-GHG-1 use to ensure
    that offsets meet rigorous standards showing they are . . . additional, and verifiable . . . ."
    The problem with this argument is that Appendix B itself states that it does not
    apply to M-GHG-1. Rather, Appendix B applies to CAP reduction measure T.-4.1.
    Appendix B is entitled "Range of Direct Investment Protocols." (Italics added.) The
    28    In its reply brief, the County glosses over this deficiency by asserting that under
    M-GHG-1, "a registry must meet the requirement of . . . section § [sic] 38562 . . . ."
    However, the text of M-GHG-1 invokes only subdivision (d)(1) of that statute, not
    subdivision (d)(2).
    54
    direct investment program is GHG reduction measure T-4.1 in the CAP. As explained
    ante, under T-4.1, the County may invest in projects in the County that reduce or
    eliminate in-County GHG emissions. The SEIR explains, "Appendix B of this Draft
    SEIR provides a range of protocols that may be applied to County direct investment
    projects to implement GHG Reduction Measure T-4.1." Elsewhere in its response to
    comments, the County similarly states, "Appendix B provides support for the County's
    local direct investment projects through CARB-approved protocols. . . . Appendix B
    applies only to how the County will ensure tracking and enforceability of GHG Reduction
    Measure T-4.1." (Italics added.) In response to another comment, the County added,
    "The performance-based protocols listed in CAP SEIR Appendix B will be used to
    develop project-level detail for implementing GHG Reduction Measure T-4.1 . . . ." At
    oral argument, the County had no response to this point.
    Thus, although nothing appears to preclude a GPA project from using an
    Appendix B protocol as part of its M-GHG-1 mitigation—nothing in M-GHG-1 requires
    it. By insisting that M-GHG-1 requires additionality because it requires GPAs to use
    Appendix B protocols, the County actually highlights one of M-GHG-1's most significant
    flaws—offset credits under M-GHG-1 need not be additional.29
    29    In this litigation, Plaintiffs have not challenged any of the Appendix B protocols.
    Therefore, for future reference they are:
    CAPCOA GHG Rx protocols: (a) Biomass Waste for Energy Project (2013);
    (b) Coastal Wetland Creation Version 1.0 (2016); (c) Compost Additions to Grazed
    Grasslands (2014); (d) Forestry Protocol #1 (2013); (e) Forestry Protocol # 2 (2013);
    55
    5. The County's arguments that M-GHG-1 is enforceable lack merit
    The County also contends that M-GHG-1 is effective and enforceable because it
    "perfectly conforms" to a "discussion draft" on carbon offsets prepared by the Governor's
    Office of Planning and Research (OPR). However, this document is not part of the
    record and we deny the County's judicial notice request. (Moore v. City of Los Angeles
    (2007) 
    156 Cal. App. 4th 373
    , 386 [review of administrative proceeding is limited to
    matters contained within the administrative record].)
    In any event, the OPR document on its face states it is a "draft" containing "initial
    thoughts." To the extent the document has any probative value, it states that offsets are a
    "permissible way to mitigate climate change impacts under CEQA." Plaintiffs do not
    challenge that point. The issue is whether M-GHG-1 does so in a CEQA-compliant
    manner, which the OPR document does not address.
    (f) Forestry Protocol #3 (2013); (g) Revised Livestock Projects (2014); (h) U.S.
    Livestock version 4.0 (2017); (i) Organic Waste Digestion (2017); (j) Weatherization of
    Single Family and Multi-Family Buildings (2016); (k) Wetland Implementation and Rice
    Cultivation in the Sacramento-San Joaquin Delta, San Francisco Estuary and the Coast of
    California Version 1.0 (2016);
    Climate Action Reserve protocols: (a) Coal Mine Methane Version 1.1; (b) Forest
    Version 4.0 (2017); (c) Grassland Version 2.0 (2017); (d) Landfill Version 4.0 (2011);
    (e) U.S. Livestock Version 4.0; (f) Nitric Acid Production Version 2.1; (g) Nitrogen
    Management Version 1.1; (h) Organic Waste Composting Version 1.1; (i) Urban Forest
    Management Version 1.0 (2014); (j) Urban Tree Planting Version 2.0 (2014); (k) U.S.
    Ozone Depleting Substances Version 2.0;
    CARB protocols: (a) U.S. Forest Projects (2015); (b) Livestock Projects Capturing
    and Destroying Methane from Manure Management Systems (2014); (c) Mine Methane
    Capture Projects Capturing and Destroying Methane From U.S. Coal and Trona Mines
    (2014); (d) Ozone Depleting Substances Projects Destruction of U.S. Ozone Depleting
    Substances Banks (2014) ; (e) Urban Forest Projects (2011).
    56
    The County also contends that the Newhall Ranch Resource Management and
    Development Plan (Newhall) is an "example of the type of project that helps the state
    achieve its emission reduction goals." The County claims that the Newhall plan relies on
    carbon offsets "from anywhere in the world for approximately 50 percent of its GHG
    emission reductions . . . ." The County concludes, therefore, that statewide emissions
    reductions "can be accomplished by reductions that occur out-of-state."
    However, comparing M-GHG-1 to Newhall's GHG mitigation measures serves
    only to demonstrate M-GHG-1's severe deficiencies. In Newhall, GHG mitigation
    measures included requirements that (1) homes, commercial buildings, and public
    facilities create as much energy as is used by implementing energy-efficient design and
    renewable energy generation, such as solar panels; (2) every home (up to 21,500) be
    equipped with an electric vehicle charging station; (3) 2,000 onsite charging stations be
    installed in commercial and community areas; (4) subsidies for electric vehicle purchases
    be provided; (4) electric school bus and neighborhood electric vehicle programs, transit
    subsidies, tech-enabled mobility features, bike-share and car-share programs be provided;
    and (5) energy efficient upgrades for schools and public buildings in disadvantaged
    communities be constructed. M-GHG-1 contains none of these measures.
    Moreover, Newhall's GHG mitigation identified "Direct Reduction Activities" that
    "are prototypical" of GHG reduction measures the developer would implement. These
    included (1) conservation of forest land to sequester GHG emissions; (2) funding clean
    burning cook stoves for underprivileged households in foreign countries (more than three
    billion people globally depend on burning wood fuels in archaic stone fires; a single clean
    57
    cook stove can save about two MTCO2e per year); and (3) programs for methane capture.
    M-GHG-1 identifies no specific GHG offset protocols to be implemented.
    Further, "to ensure environmental integrity," the Newhall GHG mitigation plan
    required that any reduction or elimination be additional. It also defined additional using
    both a legal requirement test and a performance test.30 As already explained, the text of
    M-GHG-1 does not require additionality.
    Moreover, the County is incorrect in claiming that Newhall's GHG mitigation plan
    allowed carbon offsets "anywhere in the world for approximately 50 percent of its GHG
    emission reductions." Actually, in Newhall at least 68 percent of project GHG emissions
    reductions were required to be achieved in California. Moreover, at least 80 percent were
    required to be achieved in the United States. In Newhall, even the possibility of 20
    percent international offsets was reduced by requiring the developer to continue seeking
    reasonable opportunities to obtain domestic offsets. M-GHG-1 has no similar limits on
    international offsets.
    And finally, in Newhall if the lead agency determines within 90 days that offsets
    are noncompliant with performance standards, permitting ceases until that agency
    30      The legal-requirement test requires that the activity "shall not be required for GHG
    reduction by applicable law (i.e., statute, ordinance or regulation) in effect at the time of
    the initiation" of the activity. The performance test requires that the activity "shall reduce
    GHG emissions below the applicable common industry practice for GHG reductions as in
    effect at the time" the activity is initiated. The performance test for a particular activity
    "shall be set in a protocol by an [a]pproved [r]egistry through analysis of standard
    practices and technology deployment in the applicable industry sector."
    58
    determines the standards have been met. Once again, M-GHG-1 has no safeguards for
    after-acquired information invalidating a previously issued offset.
    For the first time in its reply brief, the County also contends that M-GHG-1
    reductions would be "additional" because the County "would not permit a project
    applicant to mitigate . . . with out-of-County offsets until the applicant has exhausted the
    project's onsite and in-County options. By not raising this in its opening brief, the
    County has forfeited the point. (Doe v. California Dept. of Justice (2009) 
    173 Cal. App. 4th 1095
    , 1115 (Doe) [" ' "Obvious considerations of fairness in argument
    demand that the appellant present all of his points in the opening brief. To withhold a
    point until the closing brief would deprive the respondent of his opportunity to answer it
    or require the effort and delay of an additional brief by permission." ' "].) Moreover,
    even if we were to consider this argument, it fails because it is based on a fundamental
    misunderstanding. Additionality is not a geographic limitation, but rather considers
    whether the offset would have otherwise occurred.
    Again for the first time in its reply, citing Our 
    Children's, supra
    , 234 Cal.App.4th
    at page 882, the County contends that GHG emission reductions under M-GHG-1 are
    additional because they "would be additional to other legislatively-mandated reductions
    as assured by compliance with [s]ection 38562." This point is also forfeited. 
    (Doe, supra
    , 173 Cal.App.4th at p. 1115.) Moreover, as explained ante, M-GHG-1 does not
    invoke subdivision (d)(2) of section 38562. The offset program analyzed in Our
    Children's does. (Our Children's, at p. 877.)
    59
    E. M-GHG-1 Violates CEQA By Improperly Deferring Mitigation
    Under M-GHG-1, the Director determines whether to approve offset credits. That
    decision is based on two determinations. First, the registry or issuing entity must be
    CARB-approved or "reputable" and issue offsets consistent with section 38562,
    subdivision (d)(1). Second, the offsets must not be "available" and/or not "financially
    feasible" in a location closer to the County as listed in the geographical hierarchy.
    Plaintiffs contend that M-GHG-1 violates CEQA by improperly delegating and deferring
    mitigation to these future determinations. We agree.
    "Formulation of mitigation measures shall not be deferred until some future time."
    (Guidelines, § 15126.4, subd. (a)(1)(B).) However, the specific details of a mitigation
    measure . . . may be developed after project approval when it is impractical or infeasible
    to include those details during the project's environmental review provided that the
    agency (1) commits itself to the mitigation, (2) adopts specific performance standards the
    mitigation will achieve, and (3) identifies the type(s) of potential action(s) that can
    feasibly achieve that performance standard and that will considered, analyzed, and
    potentially incorporated in the mitigation measure." (Ibid.; see also Forest 
    Foundation, supra
    , 17 Cal.App.5th at pp. 442-443.) Where an EIR improperly defers mitigation, the
    approving agency abuses its discretion by failing to proceed as required by law. 
    (CBE, supra
    , 184 Cal.App.4th at pp. 89-90.)
    Citing Oakland Heritage Alliance v. City of Oakland (2011) 
    195 Cal. App. 4th 884
    (Oakland Heritage), the County contends that M-GHG-1 is "similar to mitigation
    measures upheld by courts that require plans or purchasing of offsets subject to review
    60
    and approval by an agency official." In Oakland Heritage, the appellate court upheld a
    mitigation measure deferring site-specific earthquake mitigation measures. However, the
    EIR in Oakland Heritage required the developer to submit a design level investigation for
    each parcel that would "be in accordance with applicable City ordinances and policies
    and consistent with the most recent version of the California Building Code, which
    requires structural design that can accommodate ground accelerations expected from
    known active faults." (Id. at p. 889.) The EIR also required that the design level
    investigation would be reviewed by a structural engineer, a registered geotechnical
    engineer, and submitted to "the City Building Services Division . . . 'to ensure compliance
    with the applicable requirements of the geotechnical investigation as well as other
    applicable code requirements.' " (Id. at p. 894.) The EIR further contained "an extensive
    discussion of the mandates of various state and [c]ity laws bearing upon seismic safety,
    including the Seismic Hazards Mapping Act [citation], the Building Code . . ., and
    various City ordinances." (Id. at p. 892.) The EIR concluded that " '[c]onsidering the
    rigorous investigation process required under the engineering standard of care,
    compliance with state laws and local ordinances, and regulatory agency technical
    reviews, the mitigation measures . . . will reduce the risk of seismic hazards and ensure
    that impacts associated with development [of the] . . . Project area would remain less than
    significant.' " (Id. at p. 910.)
    Oakland Heritage concluded that the EIR sufficiently addressed potential
    environmental impacts associated with seismicity. The court noted that the EIR
    "discussed the statutes and regulations aimed at increasing seismic safety." (Oakland
    61
    
    Heritage, supra
    , 195 Cal.App.4th at p. 907.) The EIR also "discussed the responsibilities
    of the engineers and building officials and the processes to ensure that site investigations,
    grading, and construction are completed in accordance with the laws designed to protect
    the public and property from the effects of earthquake shaking and ground failure." (Id.
    at pp. 908-909.)
    Contrary to the County's assertions, the mitigation measure in Oakland Heritage
    is materially distinguishable from M-GHG-1. In Oakland Heritage, the delegation to
    staff was based on objective statutory standards. In contrast here, M-GHG-1 provides
    only a generalized goal of no increase or net zero GHG emissions, and then allows the
    Director to determine whether any particular offset program is acceptable based on
    unidentified and subjective criteria.
    Deferred mitigation violates CEQA if it lacks performance standards to ensure the
    mitigation goal will be achieved. For example, in 
    CBE, supra
    , 
    184 Cal. App. 4th 70
    , the
    appellate court struck down deferred mitigation for GHG emissions reduction because the
    mitigation measure "merely propose[d] a generalized goal of no net increase in
    greenhouse gas emissions and then set[] out a handful of cursorily described mitigation
    measures for future consideration that might serve to mitigate the 898,000 metric tons of
    emissions resulting from the Project." (Id. at p. 93.) The mitigation measures were
    undefined, and "[t]he only criteria for 'success' of the ultimate mitigation plan" was "the
    subjective judgment of the City Council, which presumably will make its decision
    outside of any public process a year after the Project has been approved." (Ibid.) The
    mitigation plan in CBE violated CEQA because it "offered no assurance that the plan for
    62
    how the [p]roject's greenhouse gas emissions would be mitigated to a net-zero standard
    was both feasible and efficacious . . . ." (Id. at p. 95.)
    M-GHG-1 violates CEQA in much the same ways as did the deferred mitigation
    plan addressed in CBE. As there, M-GHG-1 sets a generalized goal—no net increase or
    net-zero GHG emissions. And also like CBE, achieving that goal depends on
    implementing unspecified and undefined offset protocols, occurring in unspecified
    locations (including foreign countries), the specifics of which are deferred to those
    meeting one person's subjective satisfaction.
    Endangered Habitats League, Inc. v. County of Orange (2005) 
    131 Cal. App. 4th 777
    (Endangered Habitats) is another instructive example of improper deferred
    mitigation. There, the EIR required an acoustical report to demonstrate structures were
    designed to meet noise standards "satisfactory to the manager of the county's building
    permit division." (Id. at pp. 793-794.) The Court of Appeal held this violated CEQA
    because it "does no more than . . . allow approval by a county department without setting
    any standards." (Id. at p. 794.)
    Like the improper deferred mitigation plans in CBE and Endangered Habitats, M-
    GHG-1 contains no objective standards for determining whether any particular offset
    project is "available" and "financially feasible" in one location or another. Without any
    objective and measurable standard for what "feasible" onsite reductions consist of,
    M-GHG-1 provides no reasonable assurance that any onsite GHG reduction will actually
    occur.
    63
    This concern is not merely theoretical. The County has approved GPAs using
    GHG mitigation measures similar to M-GHG-1 that will use a staggering amount of
    offsite carbon credits. For example, the County-approved Newland Sierra project
    planned to mitigate 82 percent of its GHG emissions with offsite offsets.31
    Especially troubling is that M-GHG-1 contains no objective standards for the
    Director to apply in determining whether offsets originating in foreign countries are real,
    permanent, verifiable, enforceable, and additional. As one commentator notes, the
    ordinary challenges in establishing that a domestic offset protocol meets these standards
    are magnified in foreign countries:
    "The main motivation in encouraging offsets in developing
    countries is the enhancement of forests. The question becomes,
    what is the business-as-usual scenario in a situation when
    deforestation, the destruction of forests, is business as usual? If a
    lowering of the rate of deforestation is considered an emissions
    reduction, all that means is less trees are being cut down. This is a
    far cry from the [C]ARB's domestic Urban Forest Protocol using a
    performance standard of a net gain in trees. Until there is actually an
    increase in trees, the ability to remove carbon continues to decline
    and yet offsets can be rewarded." (Ramo 
    Offset, supra
    , 20 Hastings
    W.-Nw. J Envt'l L. & Pol'y at p. 149.)
    The administrative record in this case echoes some of these same concerns,
    stating, "The complexity of the offset program . . . is certain to result in some inaccuracy,
    and potentially in fraud. These uncertainties are one of the reasons that CARB limits the
    use of offsets in the Cap-and-Trade program to no more than 8 [percent] of the total."
    31    In March 2020, a majority of the electorate voted to repeal the Board of
    Supervisors' amendment of the General Plan associated with the Newland Sierra project.
    64
    However, under M-GHG-1, the Director's findings of unavailability and feasibility could
    allow a GPA applicant to offset all project GHG emissions through credits originating in
    foreign countries.
    M-GHG-1 also entrusts to the "satisfaction of the Director" whether the proposed
    offset registry is "reputable" and the protocol being implemented by the registry is
    "consistent" with section 38562, subdivision (d)(1)—that is, whether the projected GHG
    reductions are "real, permanent, verifiable and enforceable." However, M-GHG-1 has no
    objective criteria for making such findings.32 In contrast, to ensure that GHG reductions
    are real, CARB requires the reduction be "a direct reduction within a confined project
    boundary." Thus, "[r]ecycling activities would not be eligible for offset credit as the
    recycling activities do not have a direct GHG reduction at the recycling facility. . . ."
    M-GHG-1 contains no similar standards. To ensure permanency, CARB requires there
    be "no opportunity for a reversal of the avoided emissions." This is implemented, for
    example, in CARB's forestry protocol, which requires sequestering carbon "for at least
    100 years." But M-GHG-1 lacks any permanency criteria. To ensure emissions
    reductions are additional, CARB will not approve a protocol "for a project type that
    32      At oral argument, the County asserted that objective criteria guides the Director's
    discretion under M-GHG-1 because there must be "sufficient credits"—i.e., an amount of
    carbon offsets to result in a GPA project having zero GHG emissions above the CAP. It
    is undoubtedly true that determining the amount of GHG reductions needed to obtain net
    zero is objective because it is a mathematical calculation. However, this begs the
    question whether the calculated GHG emissions reduction will actually be obtained. That
    is determined by the validity of the protocol being implemented, and M-GHG-1 does not
    require Assem. Bill No. 32 compliant protocols.
    65
    includes technology or GHG abatement practices that are already widely used."
    However, M-GHG-1 contains no such objective criteria.
    It is true that M-GHG-1 establishes a goal of no net increase above the CAP's
    GHG emission projections. However, courts have invalidated deferred mitigation
    measures having similar generalized goals that lack performance standards. 
    (CBE, supra
    ,
    184 Cal.App.4th at p. 93 [no "net increase" in GHG emissions]; Gray v. County of
    Madera (2008) 
    167 Cal. App. 4th 1099
    , 1118-1119 (Gray) [mitigation measure aimed at
    restoring water supplies governed only by generalized goal, not specific performance
    criteria]; San Joaquin Raptor Rescue Center v. County of Merced (2007) 
    149 Cal. App. 4th 645
    , 670 [measures intended to protect vernal pools relied on generalized goal and lacked
    specific performance criteria or standards].)
    In defending M-GHG-1, the County asserts that CEQA permits shifting the
    responsibility to perform a mitigation measure to agency staff's discretion. The County
    contends the discretion given the Director under M-GHG-1 is similar to mitigation
    upheld in California Clean Energy Committee v. City of Woodland (2014) 
    225 Cal. App. 4th 173
    (California Clean), Mount Shasta Bioregional Ecology Center v. County
    of Siskiyou (2012) 
    210 Cal. App. 4th 184
    (Mount Shasta), and 
    Gray, supra
    , 
    167 Cal. App. 4th 1099
    . However, these cases do not support the County's claims.
    In California Clean, a city certified an EIR for a 234-acre shopping center. A
    mitigation measure required the developer to submit a market study and urban decay
    analysis for approval by the city's community development department (Department).
    (California 
    Clean, supra
    , 225 Cal.App.4th at p. 193.) The appellate court held that the
    66
    mitigation measure properly delegated review and approval authority to the Department.
    However, the court held the measure violated CEQA by failing to specify actions
    required to alleviate urban decay. (Id. at pp. 193-195.) Similarly here, there is nothing
    inherently unlawful under CEQA by delegating M-GHG-1 determinations to the
    Director. The problem is that M-GHG-1 contains no objective criteria for exercising that
    discretion to ensure that the GHG emissions reduction goals are actually met.
    In Mount Shasta, plaintiffs challenged an EIR for a project expanding an existing
    manufacturing facility. (Mount 
    Shasta, supra
    , 210 Cal.App.4th at p. 190.) The Court of
    Appeal upheld noise mitigation measures that required postoperation acoustical testing if
    noise exceeded the level of significance (an increase of at least 3.0 dBA and an overall
    noise level above the applicable city or County standard). (Id. at p. 208.) However,
    unlike Mount Shasta, here M-GHG-1 contains no objective standard to govern the
    Director's discretion. Feasible means "capable of being accomplished in a successful
    manner within a reasonable period of time, taking into account economic, environmental,
    legal, social, and technological factors." (Guidelines, § 15364.) M-GHG-1 contains no
    objective criteria for the Director to apply in making these factual determinations.
    M-GHG-1's lack of objective standards is well illustrated by comparing it to the
    mitigation measure in Sierra 
    Club, supra
    , 
    6 Cal. 5th 502
    . That case involved an EIR for a
    planned community of 2,500 homes. (Id. at p. 508.) A mitigation measure provided that
    HVAC units would be equipped with a catalyst if "reasonably available and economically
    feasible." (Id. at p. 525.) The Supreme Court held that mitigation measure passed CEQA
    muster because the EIR objectively defined "economically feasible" to mean costing less
    67
    than 10 percent of the base HVAC cost. (Ibid.) In contrast here, M-GHG-1 contains no
    objective standard of feasibility.
    The County's reliance on 
    Gray, supra
    , 
    167 Cal. App. 4th 1099
    is also untenable.
    There, to mitigate night light impacts, the EIR required that exterior lighting shall be
    designed and maintained "such that glare and reflections are contained within the
    boundaries of the parcel, and shall be hooded and directed downward and away from
    adjoining properties and public rights-of-way." (Id. at p. 1126.) The measure also
    prohibited blinking and flashing lights and provided that all light fixtures "shall be
    appropriate to the use they are serving in scale, intensity, and height." (Ibid.) The
    measure stated, "[A]ll exterior lighting will be designed, installed and operated as
    required by the Planning Director." (Ibid.) The Court of Appeal upheld the measure
    because the agency had committed itself to "specific performance standards"—that
    lighting be hooded and directed away from adjacent properties and towards the project
    site. (Id. at p. 1127.) M-GHG-1 is materially different because mitigation measures are
    based on the Director's private and subjective discretionary determinations.
    In a related argument, citing Sacramentans for Fair Planning v. City of
    Sacramento (2019) 
    37 Cal. App. 5th 698
    (Sacramentans), the County also asserts that the
    Director's discretion under M-GHG-1 is "no greater" than the discretion afforded to the
    staff member in that case to determine that a housing project provided "a significant
    community benefit." However, the discretionary issue in Sacramentans was whether the
    68
    city's approval resulted from an unconstitutional delegation of legislative authority. (Id.
    at p. 716.) The case does not involve deferred mitigation.33
    The County also defends M-GHG-1's lack of objective standards by emphasizing
    that scientific knowledge in this area is constantly evolving. We agree that an agency
    should be encouraged to adopt flexible mitigation measures that can adapt as better
    technology becomes available (unless those changes increase the project's significant
    impacts). (See Sierra 
    Club, supra
    , 6 Cal.5th at p. 524.) However, "the novelty of
    greenhouse gas mitigation measures is one of the most important reasons 'that mitigation
    measures timely be set forth, that environmental information be complete and relevant,
    and that environmental decisions be made in an accountable arena." 
    (CBE, supra
    , 184
    Cal.App.4th at p. 96.) Although "foreseeing the unforeseeable is not possible, an agency
    must use its best efforts to find out and disclose all that it reasonably can." (Ibid.)
    The County's reliance on California Native Plant Society v. City of Rancho
    Cordova (2009) 
    172 Cal. App. 4th 603
    (Native Plant) is also unpersuasive. There, a
    project significantly impacted vernal pool habitat. (Id. at p. 610.) Mitigation measures
    included acquiring offsite habitat. (Id. at p. 612.) Project opponents asserted that the
    agency improperly deferred mitigation by failing to specify where offsite vernal pools
    might be acquired. (Ibid.) The Court of Appeal rejected that contention because the
    33      The CEQA issues in Sacramentans were whether (1) the regional transportation
    and emissions reduction plan were inadequate; and (2) the impact analysis improperly
    tiered to prior environmental impact reports. 
    (Sacramentans, supra
    , 37 Cal.App.5th at
    p. 718.)
    69
    mitigation measure included objective criteria—replacement habitat in a specified ratio
    (2:1) to the habitat lost from the project. (Id. at pp. 621-622.) The case is inapposite
    because M-GHG-1 lacks objective criteria to ensure mitigation is effective.
    Citing Gentry v. City of Murrieta (1995) 
    36 Cal. App. 4th 1359
    , the County also
    contends that "courts have upheld mitigation measures such as M-GHG-1 where a
    building official . . . must review and approve a plan or proposed implementation of a
    mitigation measure, essentially performing a mitigation monitoring function." However,
    this argument misses the target. The CEQA defect in M-GHG-1 is not that it allows one
    person—the Director—to make discretionary decisions. The problem is M-GHG-1 lacks
    objective criteria to ensure the Director's exercise of that discretion will result in GHG
    reduction that is real, permanent, quantifiable, verifiable, enforceable, and additional.
    Unlike M-GHG-1, the mitigation measure in Gentry was "subject to a host of specific
    performance criteria imposed by various ordinances, codes, and standards, as well as
    other mitigation conditions." (Id. at p. 1395.)
    F. The Effect of M-GHG-1's Invalidity on the CAP
    After determining that M-GHG-1 was invalid under CEQA, the superior court also
    held the CAP was invalid because it "expressly incorporated" M-GHG-1 by reference.
    As explained ante, we read the CAP differently because M-GHG-1 is not a CAP GHG
    emission reduction measure for GPU-consistent projects, but rather is a mitigation
    measure for GPAs in the SEIR. Nevertheless, we too conclude that the CAP is tainted by
    M-GHG-1, albeit on somewhat different grounds.
    70
    The CAP contains in-County GHG projections for 2020, 2030, and 2050. Those
    projections perform important CEQA functions by (1) informing the public of the total
    GHG emissions to be expected if the CAP is implemented; and (2) determining the extent
    to which a GPU-consistent project must eliminate or reduce GHG emissions to be within
    the threshold of significance.
    These projections exclude forecasted GHG emissions from future GPAs and
    in-process GPAs that the County had not adopted by August 2017. The CAP excludes
    these on the assumption that in-process and future GPAs will mitigate GHG emissions
    above the CAP to zero under M-GHG-1. Because M-GHG-1 is invalid, there is no
    factual basis for that assumption. Accordingly, to this extent the CAP's finding that
    in-process and future GPAs would not result in significant GHG impacts is not supported
    by substantial evidence.
    G. The SEIR Discloses M-GHG-1's 30-Year Shelf Life
    Golden Door contends that the CAP and SEIR are misleading because they do not
    disclose that M-GHG-1 requires offsets for only 30 years, after which "any purported
    GHG reductions from offset credits vanish, and the County's ability to meet GHG targets
    worsens significantly." However, the SEIR states, "M-GHG-1 . . . requires GPAs that
    increase density or intensity above the 2011 GPU to offset additional (Option 1) or all
    (Option 2) GHG emissions for a 30-year period." The SEIR also explains that a 30-year
    71
    project life is "consistent with the 30-year project lifetime frame used by the South Coast
    Air Quality Management District's GHG guidance (SCAQMD 2008)."
    III.
    CUMULATIVE IMPACTS
    A. Additional Background
    The SEIR identifies 21 GPAs. These include Newland Sierra (2,135 dwelling
    units), Otay 250 (up to 3,158 dwelling units), and Otay Ranch Village 14 (1,119 dwelling
    units).34
    The SEIR acknowledges that these in-process GPAs "are reasonably foreseeable
    [and] have sufficient detail and plans to understand the changes in land use conditions
    that are proposed . . . ." The SEIR also acknowledges that these GPAs are "probable
    future projects that when combined with the [P]roject, could result in a cumulatively
    considerable effect." The SEIR addresses cumulative GHG impacts from these GPAs by
    requiring them to mitigate under M-GHG-1. The issue here is whether CEQA requires
    analysis of cumulative impacts from in-process GPAs other than, and in addition to, their
    projected GHG emissions.
    Although conceding that "[t]he SEIR properly finds that GPAs are reasonably
    foreseeable," the County claims no additional cumulative impacts analysis is required
    because (1) "the parameters of those projects remained highly speculative"; and (2) the
    34     Sierra Club's request for judicial notice of the County's plans for review and
    approval of the Otay Ranch Village 14 GPA, and that project's draft EIR is denied as
    irrelevant. 
    (SDOG, supra
    , 13 Cal.App.5th at p. 90, fn. 8.)
    72
    County did not know whether the in-process GPAs would rely on carbon offsets, "and if
    so, whether that reliance would . . . result in other impacts such as air quality, noise,
    energy, or transportation . . . ." For the first time in its reply brief, the County further
    contends that even if in-process GPAs would "vastly increase GHG emissions, energy
    impacts, and air emissions through unaccounted VMT increases," there is no harm
    because "[t]he CAP would reduce GHG emissions and related air quality and energy
    impacts compared to conditions without the CAP."35
    B. Cumulative Impacts and the Standard of Review
    A cumulative impact is one "created as a result of the combination of the project
    evaluated in the EIR together with other projects causing related impacts". (Guidelines,
    § 15130, subd. (a)(1).) "The cumulative impact from several projects is the change in the
    environment which results from the incremental impact of the project when added to
    other closely related past, present, and reasonably foreseeable probable future projects."
    (Id., § 15355, subd. (b).)
    Environmental impacts of probable future projects must be analyzed because
    "consideration of the effects of a project or projects as if no others existed would
    encourage the piecemeal approval of several projects that, taken together, could
    35      Also for the first time in its reply brief, the County claims that the SEIR analyzed
    air quality emissions from "reasonably foreseeable" GPAs "based on their location and
    proposed mix of uses . . . ." However, by not raising these arguments in its opening brief,
    the County has forfeited them. 
    (Doe, supra
    , 173 Cal.App.4th at p. 1115.) Applying
    forfeiture is especially appropriate because in the opening brief, the County took a
    contrary position, asserting that no cumulative impact analysis beyond GHG emissions
    was required.
    73
    overwhelm the natural environment and disastrously overburden the man-made
    infrastructure and vital community services. This would effectively defeat CEQA's
    mandate to review the actual effect of the projects upon the environment." (Las Virgenes
    Homeowners Fed'n v. County of L. A. (1986) 
    177 Cal. App. 3d 300
    , 306.) The agency
    must interpret this requirement to " 'afford the fullest possible protection of the
    environment.' " (Friends of the Eel River v. Sonoma County Water Agency (2003) 
    108 Cal. App. 4th 859
    , 868 (Eel River).)
    An EIR must analyze cumulative impacts of a project when the project's
    incremental effect is cumulatively considerable. (Guidelines, § 15130, subd. (a);
    Bakersfield Citizens for Local Control v. City of Bakersfield (2004) 
    124 Cal. App. 4th 1184
    , 1214 (Bakersfield Citizens).) Moreover, if a mitigation measure would itself create
    new significant environmental impacts, these too must be discussed, "though in less
    detail than required for those caused by the project itself." (Forest 
    Foundation, supra
    ,
    17 Cal.App.5th at p. 432.)
    Even where, as here, a program EIR is involved, "[t]he fact more precise
    information may be available during the next tier of environmental review does not
    excuse [the agency] from providing what information it reasonably can now. [Citation.]
    Moreover, if known impacts are not analyzed and addressed in a program EIR, they may
    potentially escape analysis in a later-tier EIR." (Forest 
    Foundation, supra
    , 17
    Cal.App.5th at p. 440.) "If, on the other hand, the cumulative impact is insignificant or if
    the project's incremental contribution to the impact is not cumulatively considerable, the
    lead agency is not required to conduct a full cumulative impacts analysis, but the EIR
    74
    must include a brief explanation of the basis for the agency's finding(s)." (San Francisco
    Baykeeper, Inc. v. State Lands Com. (2015) 
    242 Cal. App. 4th 202
    , 222 (SF Baykeeper).)
    " 'We review an agency's decision regarding the inclusion of information in the
    cumulative impacts analysis under an abuse of discretion standard. "The primary
    determination is whether it was reasonable and practical to include the projects and
    whether, without their inclusion, the severity and significance of the cumulative impacts
    were reflected adequately." ' " (Rodeo Citizens Assn. v. County of Contra Costa (2018)
    
    22 Cal. App. 5th 214
    , 231 (Rodeo Citizens).)
    C. The SEIR's Cumulative Impacts Analysis Fails Because It Does Not Address
    Impacts by GPAs Mitigating GHG Emissions under M-GHG-1
    When conducting a cumulative impacts analysis, an agency must include closely
    related projects that are currently under environmental review. This is because once
    review is begun, a significant investment of time, money, and planning has probably
    occurred. Thus, once an EIR is initiated, the project is probable rather than merely
    possible. (Eel 
    River, supra
    , 108 Cal.App.4th at p. 870.)
    For example, in San Franciscans for Reasonable Growth v. City & County of San
    Francisco (1984) 
    151 Cal. App. 3d 61
    (SFRG), the agency considered a proposal to
    construct high-rise downtown office buildings. (Id. at p. 67.) As part of its cumulative
    impacts analysis, the agency considered the amount of new office space that would be
    added to the area by other approved projects. (Id. at p. 68.) Project opponents asserted
    that the agency violated CEQA by failing to consider projects then under environmental
    review. (Id. p. 74.) The Court of Appeal agreed, stating, "Because projects under
    75
    environmental review . . . could easily have been ascertained by the [agency] from its
    own records, there was no practical or reasonable barrier to their disclosure and inclusion
    in the analyses. . . . The only reason we can infer for the [agency's] failure to consider
    and analyze this group of projects was that it was more expedient to ignore them." (Ibid.)
    Elaborating, the appellate court stated:
    "First, experience and common sense indicate that projects which
    are under review are ['reasonably] foreseeable probable future
    projects. . . .' Ordinarily an office building project that is awaiting
    environmental approval has reached a stage of development where
    the developer, financial institutions, and contractors almost certainly
    view its construction to be a very real probability, and not without
    reason. Such a view is doubtless shared by those performing the
    environmental review and preparing the EIR.
    "Second, we find it illogical that an EIR should carefully
    evaluate the direct impacts of one project which is 'under
    environmental review,' but completely ignore the cumulative
    impacts of that project's siblings in the same category. Nothing
    makes the EIR's subject project more 'probable' or 'foreseeable' than
    any of the other projects under review, just as nothing makes them
    less so." 
    (SFRG, supra
    , 151 Cal.App.3d at p. 75.)
    Here, the 21 in-process GPAs, if constructed, would collectively add nearly
    14,000 dwelling units in the unincorporated County. The EIRs for just five of these
    disclose they will collectively produce 139,485 MTCO2e in construction-related GHG
    emissions alone.36 However, the SEIR does not analyze these cumulative impacts—
    except by stating that in-process GPAs will mitigate to zero above the CAP under
    M-GHG-1.
    36     One hundred thirty nine thousand four hundred eighty five MTCO2e is equivalent
    to about one year of GHG emissions from 30,000 combustion engine cars.
    76
    These in-process GPAs are closely related projects currently under environmental
    review. They are closely related because the CAP and SEIR address GHG emissions
    reduction in the unincorporated County and from County operations, and the GPAs will
    create GHG emissions in this same geographic area. These GPAs are in the process of
    environmental review by the County as lead agency. Accordingly, the SEIR should have
    considered whether these GPAs (listed in Table 1-3 of the SEIR) would create
    cumulatively considerable impacts in addition to GHG impacts in combination with the
    Project.37 As Golden Door correctly notes, cumulative impacts from adding 14,000
    dwellings and related infrastructure in projects utilizing M-GHG-1 (and, therefore, using
    offsite carbon offsets to mitigate their in-County GHG emissions) would likely include
    impacts to air quality, energy, and vehicle miles traveled, among others. "The absence of
    this analysis makes the [S]EIR an inadequate informational document." (Eel 
    River, supra
    , 108 Cal.App.4th at p. 872.)
    The County contends that analyzing cumulative impacts (in addition to GHG
    impacts) from in-process GPAs requires an inappropriate level of detail for the SEIR.
    However, the detail required for a cumulative impact analysis is based on reasonableness
    and practicality. (Rodeo 
    Citizens, supra
    , 22 Cal.App.5th at p. 231.) In this case, the
    SEIR admits that the in-process GPAs are "reasonably foreseeable [and] have sufficient
    detail and plans to understand the changes in land use conditions that are proposed."
    37    SEIR Table 1-3 contains "the complete list of GPAs" that were under County
    review as of August 2017.
    77
    Despite knowing that (1) these probable GPAs would add some 14,000 homes, and
    (2) these projects would implement M-GHG-1 by using offsite carbon offsets—the
    County did not analyze any of their cumulative impacts apart from GHG emissions
    (which the SEIR concluded would be mitigated to zero above the CAP.) The problem
    here is not a lack of detail about a cumulative impact considered; the CEQA defect is the
    failure to analyze any such cumulative impact at all.
    The County does not explain how the GPAs could be probable and foreseeable
    enough to create cumulatively considerable GHG impacts, but not probable and
    foreseeable enough to create, for example, vehicle miles traveled impacts from projects
    expected to add 14,000 new homes to the backcountry. Of course, if a potential
    cumulative impact is insignificant, the lead agency is not required to conduct "a full
    cumulative impacts analysis," but must explain the basis for the finding of insignificance.
    (SF 
    Baykeeper, supra
    , 242 Cal.App.4th at p. 222.) However, the SEIR also fails to
    engage in that analysis.
    The County also defends its failure to analyze these cumulative impacts by
    asserting, "CEQA does not require the SEIR to speculate about whether the County
    would approve pending project applications or the conditions imposed should the County
    approve them." Citing Sacramento Old City Assn. v. City Council (1991) 
    229 Cal. App. 3d 1011
    (Sacramento Old City) and Environmental Council of Sacramento v.
    City of Sacramento (2006) 
    142 Cal. App. 4th 1018
    (Environmental Council of
    Sacramento), the County asserts that "[e]ven though applications for GPAs
    existed . . . the parameters of those projects remained highly speculative." The County
    78
    claims it did not know of changes that might be made "during the public process, whether
    the future and proposed projects would rely on carbon offsets, and if so, whether that
    reliance would . . . result in other impacts such as air quality, noise, energy, or
    transportation." The County repeated this at oral argument, noting that after the County
    certified the SEIR, the general plan amendment for one of the in-process GPAs was set
    aside by referendum.
    However, the SEIR itself contradicts the claim that the GPAs were too speculative.
    Table 1-3 of the SEIR contains a list of "past, present, and probable future projects that
    when combined with the [P]roject could result in a cumulatively considerable effect."
    (Italics added.) Moreover, the County's reliance on Sacramento Old City and
    Environmental Council of Sacramento for the opposite conclusion is unavailing. In both
    cases, the future projects were not then in any stage of development. In Sacramento Old
    City, plaintiffs challenged an EIR for a project expanding a convention center and
    constructing an office tower. (Sacramento Old 
    City, supra
    , 229 Cal.App.3d at p. 1016.)
    Among other things, the EIR determined that an additional 2,621 parking spaces would
    be needed. (Id. at p. 1020.) Plaintiffs argued that mitigation measures to accommodate
    the 2,600 parking space deficit would include constructing new downtown parking lots,
    erecting a large parking garage, or shuttling hundreds of people from outlying parking
    areas—all of which in themselves would create substantial cumulative environmental
    impacts that must be analyzed in the EIR, but were not. (Id. at p. 1030.) The Court of
    Appeal rejected that contention, stating, " 'prophecy' is not required in an EIR" and "[n]or
    79
    do we require discussion in the EIR of specific future action that is merely contemplated
    or a gleam in the planner's eye." (Id. at p. 1031.)
    Environmental Council involved a habitat conservation plan and implementation
    agreement for protecting hawks and snakes in a 53,537 acre basin. (Environmental
    Council of 
    Sacramento, supra
    , 142 Cal.App.4th at p. 1023.) The conservation plan
    established a program to minimize and mitigate the expected loss of habitat and
    incidental killing of covered species that could result from authorized urban development
    of 17,500 acres. (Id. at p. 1025.) Subsequently, the city and county adopted a
    memorandum of understanding (MOU) outlining an approach for future agreements
    regarding land use in the basin. (Id. at pp. 1029-1030.) The MOU did not approve
    development nor involve any specific development proposals. (Id. at p. 1030.) No funds
    were committed under the MOU, and the MOU did not change any existing land use
    requirements but rather contemplated further discretionary approvals and environmental
    review. (Ibid.) A federal court described the MOU as "tentative" and stated that
    development under the MOU "was not reasonably certain to occur . . . ." (Ibid.) The
    plaintiffs in Environmental Council asserted that CEQA required the agencies to consider
    cumulative impacts from the MOU. (Id. at pp. 1028-1029.) The Court of Appeal
    rejected that argument because the MOU involved "unspecified and uncertain
    development that might be approved in the future" and "[f]ar too little is known about the
    scope, the location, or the types of projects that might be proposed in the future . . . ."
    (Id. at p. 1032.)
    80
    In sharp contrast here, the in-process GPAs were well beyond the initial planning
    stages. The County knew the scope, location, types of projects being proposed and, in
    some cases, even specific amounts of GHG emissions that would be mitigated with offset
    credits originating out of County. In the superior court, the County filed a declaration by
    one of its planning managers, who authenticated excerpts from the Lake Jennings
    Marketplace EIR. That EIR requires the applicant to purchase 2,708 MTCO2e in offset
    credits before the first grading permit is issued and another 71,880 MTCO2e of credits
    before the first certificate of occupancy is issued. In the same declaration, the planning
    manager also authenticated EIR excerpts of five other in-process GPAs with similar GHG
    mitigation measures. As summarized in the table post, these in-process GPAs will
    mitigate GHG emissions by purchasing listed amounts of offset credits, almost certainly
    originating outside the County:
    Project                  EIR date                  Offset Provision Summary
    Newland Sierra38        Draft EIR circulated      Requires carbon offsets for
    June 2017.                approximately 82 percent of its GHG
    emissions. Allows international
    offsets.
    Warner Ranch            Draft EIR circulated      Requires purchasing 2,413 MTCO2e
    December 2016.            in annual carbon offsets.
    Harmony Grove           Draft EIR in April        Requires 4,411 MTCO2e in offset
    Village South           2017, revised in          credits before issuance of the first
    February 2018.            grading permit and thereafter 5,222
    annually; allows international offsets.
    38      The administrative record contains public communications stating that the
    Newland Sierra project includes a GPA that would add over 2,100 homes in an area
    zoned for only 99 homes in the GPU and is six miles from the nearest public transit
    center.
    81
    Valiano                 Final EIR published in Requires offset credits up to 6,123
    February 2018.         MTCO2e to mitigate construction-
    related GHG emissions and 4,493
    annually for operational GHG
    emissions.
    Otay 250                Final EIR published in Even with onsite mitigation, the
    March 2018.            project will result in 37,554 MTCO2e
    that may be mitigated with offsets,
    including internationally.
    As lead agency, the County had access to these EIRs and, therefore, was not
    required to speculate about their contents. The County knew or reasonably should have
    known that these GPAs would almost certainly be purchasing out-of-County credits to
    offset in-County GHG emissions. Accordingly, the SEIR was required to consider
    whether these GPAs and others like them would lead to significant cumulative impacts in
    combination with the Project.
    In a related argument, the County urges that cumulative impact analysis should be
    deferred until project-specific environmental review of each of the GPAs. However, in
    Forest Foundation, this court rejected a similar argument, stating: " 'Designating an EIR
    as a program EIR . . . does not by itself decrease the level of analysis otherwise required
    in the EIR. [I]n considering a challenge to a program EIR, 'it is unconstructive to ask
    whether the EIR provided "project-level" as opposed to "program-level" detail and
    analysis. Instead, we focus on whether the EIR provided "decisionmakers with sufficient
    analysis to intelligently consider the environmental consequences of [the] project.' "
    (Forest 
    Foundation, supra
    , 17 Cal.App.5th at p. 426.)
    82
    In sum, the SEIR's cumulative impact analysis is inadequate because it fails to
    address reasonably known cumulatively considerable impacts from probable GPAs
    utilizing M-GHG-1 to mitigate GHG emissions by purchasing out-of-County offsets.39
    IV.
    THE SEIR'S FINDING OF CONSISTENCY WITH THE REGIONAL TRANSPORTATION
    PLAN IS NOT SUPPORTED BY SUBSTANTIAL EVIDENCE
    A. Senate Bill No. 375—Background
    In 2008, the Legislature enacted the Sustainable Communities and Climate
    Protection Act (Stats. 2008, ch. 728, § 1; Stats. 2009, ch. 354, § 5), commonly known as
    Senate Bill No. 375 (Sen. Bill No. 375), to reduce GHG emissions through improved land
    use and transportation planning. Sen. Bill No. 375's findings and legislative declarations,
    quoted in part below, emphasize the necessity for changed land use patterns and
    improved transportation to meet Assem. Bill No. 32 goals:
    "(a) The transportation sector contributes over 40 percent of the
    greenhouse gas emissions in the State of California; automobiles and
    light trucks alone contribute almost 30 percent. The transportation
    sector is the single largest contributor of greenhouse gases of any
    sector. [¶] . . . [¶]
    "(c) Greenhouse gas emissions from automobiles and light trucks
    can be substantially reduced by new vehicle technology and by the
    increased use of low carbon fuel. However, even taking these
    measures into account, it will be necessary to achieve significant
    additional greenhouse gas reductions from changed land use patterns
    and improved transportation. Without improved land use and
    transportation policy, California will not be able to achieve the
    39    Our analysis assumes without deciding that the GHG mitigation measure(s) in
    EIRs for these in-process GPAs is/are lawful. Those projects are not before us and we
    express no opinion on that issue.
    83
    goals of AB 32." (Gov. Code, § 14522.1 [Section 1 of Stats. 2008,
    ch. 728 [Sen. Bill No. 375]], italics added.)
    Under Sen. Bill No. 375, CARB must develop region-by-region emission
    reduction targets for automobiles and light trucks for 2020 and 2035. (Gov. Code,
    § 65080, subd. (b)(2)(A).) "The targets set by CARB for the San Diego region, using a
    2005 baseline, require a 7 percent per capita reduction in greenhouse gas emissions by
    2020 and a 13 percent per capita reduction by 2035." (Cleveland 
    National, supra
    , 3
    Cal.5th at p. 506.)
    Metropolitan planning organizations (MPOs) are also involved in implementing
    Sen. Bill No. 375. MPOs are federally required organizations comprised of
    representatives of local government, transportation agencies, and state officials.
    (23 U.S.C. § 134.) The San Diego Association of Governments (SANDAG) is the MPO
    for the San Diego region.
    Under Sen. Bill No. 375, each MPO must draft and adopt a Sustainable
    Communities Strategy (SCS) as part of its regional transportation plan (RTP). (Gov.
    Code, § 65080, subd. (b)(2)(B).) CARB reviews and either approves or rejects each SCS.
    (Id., subd. (b)(2)(J)(ii).)
    An SCS establishes how planned land uses and transportation projects will achieve
    CARB's GHG reduction targets. These include "a forecasted development pattern for the
    region, which, when integrated with the transportation network, and other transportation
    measures and policies, will reduce the greenhouse gas emissions from automobiles and
    light trucks to achieve, if there is a feasible way to do so, the greenhouse gas emission
    84
    reduction targets approved by [CARB] . . . ." (Gov. Code, § 65080, subd. (b)(2)(B)(vii).)
    An SCS must also (1) assess how to provide housing for all income levels of the regional
    population, projected eight years into the future; and (2) identify a transportation network
    to service the region's transportation needs. (Id., subd. (b)(2)(B)(iii) & (iv).)
    "The reductions mandated by [Sen. Bill No. 375] may be achieved through a
    variety of means, including 'smart growth' planning to maximize building densities at
    locations served by public transit and to locate residences near needed services and
    shopping to reduce automobile dependency.[40] Other means include shifting
    investment toward mass transit, changing transportation pricing, and encouraging car
    sharing, walking, and biking." (Cleveland 
    National, supra
    , 3 Cal.5th at p. 506.)
    Because the RTP must be internally consistent, the housing needs analysis and the
    reductions in GHG emissions must work together to achieve the stated goals. (Gov.
    Code, § 65080, subd. (b) ["The [RTP] shall be an internally consistent document"].)
    However, the SCS is not the equivalent of a general plan. The SCS does not directly
    require local government to take particular actions in planning, regulating, and permitting
    land development. (Gov. Code, § 65080, subd. (b)(2)(K) ["Nothing in a[n SCS] shall be
    interpreted as superseding the exercise of the land use authority of cities and counties
    within the region."].)
    40     Smart growth means "compact, efficient, and environmentally sensitive pattern of
    development that focuses future growth away from rural areas and closer to existing and
    planned job centers and public facilities, while preserving open space and making more
    efficient use of existing urban infrastructure."
    85
    Sen. Bill No. 375 requires the California Transportation Commission to establish
    guidelines for an MPO to use in developing an RTP. (Gov. Code, § 14522.1, subd.
    (a)(1).) These guidelines must take VMT into account:
    "(b) The guidelines shall . . . account for all of the following:
    "(1) The relationship between land use density and household
    vehicle ownership and vehicle miles traveled in a way that is
    consistent with statistical research.
    "(2) The impact of enhanced transit service levels on household
    vehicle ownership and vehicle miles traveled." (Gov. Code,
    § 14522.1, subd. (b)(1) & (2).)
    However, under Sen. Bill No. 375, a combination of factors and methodologies
    may be used to achieve GHG reduction targets. Each percentage reduction in GHG
    emissions assigned to a particular MPO does not require that same percentage reduction
    in VMT. (Gov. Code, § 65080, subd. (b)(2)(A)(i).)
    B. SANDAG's Regional Plan
    As part of its mandate under Sen. Bill No. 375, SANDAG's target is to reduce the
    region's per capita GHG emissions from cars and light trucks by 7 percent by 2020 (when
    compared with a 2005 baseline), and 13 percent by 2035. To achieve these goals,
    SANDAG developed an SCS as part of its RTP (Regional Plan).
    The Regional Plan is organized around five strategies: (1) focus housing and job
    growth in urbanized areas where there is existing and planned transportation
    infrastructure, including transit; (2) preserve sensitive habitat, open space, cultural
    resources, and farmland; (3) establish a transportation network that reduces GHG
    86
    emissions; (4) address housing needs of all economic segments of the population; and
    (5) implement the regional plan through incentives and collaboration.
    1. Housing
    The Regional Plan states, "Land use decisions made at the local level can impact
    nearly all sources of emissions . . . . Development guided by smart growth principles—
    remember: more compact communities, less suburban sprawl—brings people closer to
    more destinations. It also encourages alternative travel choices, such as public transit,
    carpooling, walking and biking, which cut greenhouse gas emissions and other forms of
    pollution."
    The Regional Plan notes that "[d]uring the last 15 years, our jurisdictions have
    changed their land use plans significantly, resulting in development patterns that
    concentrate future growth in urbanized areas, reduce sprawl, and preserve more land for
    open space and natural habitats." SANDAG states these were "seismic shifts" in thinking
    about how to grow. The Regional Plan concludes that the "long-term plans for our local
    cities and the County of San Diego now call for focusing new growth in the urbanized
    areas of the western portion of our region where more people already live." By designing
    communities that better integrate land use and transportation, the Regional Plan seeks to
    "create more opportunities for developing a wider variety of travel choices beyond the
    car . . . ."
    SANDAG forecasts that the San Diego region will continue to grow more
    sustainably. "More compact and efficient communities, paired with a greater variety of
    transportation options and less sprawl, will result in preserved open space and habitat,
    87
    and a more efficient use of water and energy." New housing should be located "in urban
    communities close to jobs and transit."
    "While the western areas will grow over time through more compact communities,
    more land in the eastern two-thirds of the region will be preserved as open space." The
    Regional Plan encourages local jurisdictions in the region "to continue to embrace smart
    growth and sustainable development" because "new growth and development in the most
    urbanized areas of the region is a key strategy toward sustainability."
    Sen. Bill No. 375 requires that areas be identified within the region sufficient to
    house the region's entire population over the course of the planning period. The Regional
    Plan forecasts needing 325,000 additional homes. The Regional Plan states that "[n]ew
    housing should be located in urban communities close to jobs and transit." SANDAG
    projects that 82 percent of homes to be built by 2050 will be attached multifamily units
    mostly located where the greatest investments in public transit are being made.
    Approximately 55 percent of the region will be preserved as open space and parks,
    habitat, or farmland.
    2. Transportation
    The "heart" of the Regional Plan is an SCS that "charts a course toward lower
    GHG emissions related to cars and light trucks, and proposes other measures to make the
    San Diego region more environmentally sustainable." The SCS focuses on transportation
    because "about a third of GHG emissions generated in this nation come from that sector
    alone." Transportation is also the largest source of GHG emissions in the region. In
    2012, passenger cars and light trucks comprised 37 percent of the region's GHG
    88
    inventory. Although the transportation sector is responsible for the greatest GHG
    reductions (nearly 30 percent of the total), most of those reductions will come from
    higher fuel efficiency vehicles (18 percent) and a more diverse fuel mix (low carbon fuel
    standards) (9 percent). Statewide regional transportation plans are responsible for less
    than three percent of the GHG reductions.
    SANDAG states that its Regional Plan will exceed its CARB targets
    "[b]y . . . using land in ways that make developments more compact, conserving open
    space, and investing in a transportation system that provides people with alternatives to
    driving alone." "Reducing the number of miles that people travel in their cars is an
    important goal." "Fuel efficiency improvements and alternatives also comprise a major
    part of" planned GHG emission reductions from the transportation sector.
    The Regional Plan states that it will exceed CARB's goals, resulting in a 15
    percent per capita reduction in emissions by 2020, and a 21 percent per capita reduction
    by 2035—"far more than what the state mandates require . . . ." Approximately half of
    the reductions would result from "investment in transit projects and their operations,
    managed lanes, active transportation projects" and measures "that support . . . working
    from home or telecommuting." "About one-quarter of the reductions are estimated from
    changing land use and population characteristics, while another quarter are projected
    from increases in the cost of driving . . . ."
    89
    C. The SEIR's Discussion of Consistency with Sen. Bill No. 375
    1. The CAP
    The SEIR states that the Project is consistent with the Regional Plan and with Sen.
    Bill No. 375. With respect to the CAP, the SEIR states that GHG reduction measure
    T.2.1 would "implement traffic calming measures," and measure T.2.2 would require
    private employers to adopt a transportation demand management program.41 Measure
    T-2.3 reduces County employee VMT by 20 percent by 2030. Parking restrictions in
    measure T-2.4 reduce VMT by 10 percent by 2030. The SEIR concludes that
    "[a]dditional supporting efforts for the built environment and transportation category" in
    the CAP "would also encourage efforts to support the goals and policies of Sen. Bill
    No. 375 and the [Regional Transportation Plan]/SCS." The CAP's numerous GHG
    reduction measures will contribute 13 percent of GHG reductions needed to meet the
    2030 target and 8 percent of the GHG reductions estimated for 2050. These include
    41      Measure T-2.1 seeks to reduce VMT by making pedestrian and bicycle trips "a
    more comfortable and safer experience when traveling along public roads. Specific
    improvements may include marked crosswalks, countdown signal timers, speed humps,
    and protected bikeways. Measure T-2.2 states it will reduce emissions from commute
    VMT in new nonresidential development by 15 percent by 2030 by amending the County
    Code to include a Transportation Demand Management Ordinance requiring measures
    such as telecommuting, car sharing, vanpools, carpools, shuttle service, bicycle parking
    facilities, and transit subsidies.
    90
    (1) reducing VMT by acquiring open space, agricultural easements, and updating
    community plans; (2) using alternative fuels in County projects and installing electric
    vehicle charging stations; and (3) establishing a local direct investment program.
    Summarizing its strategy to reduce VMT, the CAP states:
    "The county's largest unincorporated communities are located in
    the western areas of the county, with access to water, sewer, roads,
    schools, and other public facilities. Focusing new development in
    and around existing unincorporated communities allows the County
    to maximize existing infrastructure . . . .
    "This strategy focuses on preserving open space and agricultural
    lands, and focusing density in the county villages. Conservation
    efforts will avoid GHG emissions from transportation and energy
    use associated with conveyance of water and solid waste service.
    Reductions in Vehicle Miles Traveled (VMT) resulting from this
    strategy will also improve air quality through reduced vehicle
    emissions and contribute to public health improvements by creating
    opportunity for active transportation choices."42
    The SEIR also concludes that the CAP is consistent with the Regional Plan's VMT
    projections. The SEIR explains this is because the County provided SANDAG land use
    forecasts based on the GPU. SANDAG, in turn, used these forecasts to make VMT
    projections that achieve Sen. Bill No. 375 targets. The CAP uses these same VMT
    forecasts for the GHG reduction measures. The SEIR concludes that the CAP's GHG
    inventory is consistent with SANDAG's VMT projections, since both are based on
    projected build-out under land uses allowed under the GPU.
    42    "Active transportation choices" includes any method of travel that is human
    powered, such as walking and bicycling.
    91
    The SEIR acknowledges the "disproportionality" between the percentage of GHG
    emissions attributable to the transportation sector (45 percent) and the lower percentage
    of GHG emissions reductions attributable to CAP GHG reduction measures (13 percent).
    The SEIR explains that disparity is the unavoidable result of the unincorporated county's
    "low-density development" and "intervening distance between land uses."
    2. M-GHG-1
    The SEIR acknowledges that "several comments question how . . .
    M-GHG-1 . . . addresses the consistency of future projects proposing a [GPA] with Sen.
    Bill No. 375." The SEIR states that such projects "have the potential to result in a
    significant cumulative GHG impact because they may adversely affect the ability of the
    CAP to meet its targets and goal . . . ." Nevertheless, the SEIR explains that M-GHG-1 is
    consistent with Sen. Bill No. 375 and the Regional Plan because (1) it is the GPA
    applicant's responsibility (not the County's) to determine how the GPA affects VMT
    projections and the region's ability to meet Sen. Bill No. 375 targets; and (2) it would be
    "speculative" to "presuppose approval of future and proposed GPA projects, including the
    GHG emissions and VMT from these future projects. The SEIR concludes, therefore,
    that "M-GHG-1 would ensure that GPAs are mitigating their emissions such that they
    would not conflict with the Regional Plan and Sen. Bill No. 375 targets . . . ."
    D. The Plaintiffs' and the Amicus Attorney General's Contentions
    Plaintiffs contend that "[t]he CAP, via M-GHG-1, creates a 'pathway' for future
    GPAs to mitigate their emissions through the purchase of out-of-county carbon offsets, in
    direct contradiction of Sen. Bill No. 375's instruction to reduce emissions from land use
    92
    development and transportation patterns." In a related argument, Plaintiffs assert that
    "the SEIR does not fully address how facilitating sprawl development and increased
    VMTs by authorizing out-of-County offsets would be consistent with the [Regional
    Plan]."
    Appearing as amicus curiae, the Attorney General amplifies these arguments,
    noting that one of the GPAs, Harmony Grove Village South, will increase VMT by 11.5
    million miles annually.43 Like Plaintiffs, the Attorney General asserts that the SEIR fails
    as an informative document because "the SEIR does not even acknowledge that
    [M-GHG-1] will foreseeably result in increased VMT, let alone provide a complete
    analysis of its consistency with the SANDAG Plan."
    E. The Consistency Finding is Not Supported by Substantial Evidence
    1. Introduction
    The SEIR concludes that M-GHG-1 is consistent with the Regional Plan and Sen.
    Bill No. 375 targets, stating: "[I]ncorporation of M-GHG-1 would ensure that GPAs are
    mitigating their emissions such that they would not conflict with the Regional Plan and
    Sen. Bill No. 375 targets . . . ." Plaintiffs challenge this finding, asserting it is not
    supported by substantial evidence and that as a result, the SEIR fails as an informational
    document. We agree.
    43     The Attorney General filed an amicus curiae brief under California Rules of Court,
    rule 8.200(c)(7).
    93
    An EIR must "discuss any inconsistencies between the proposed project
    and . . . regional plans" including "regional transportation plans." (Guidelines, § 15125,
    subd. (d).) This determination must be supported by substantial evidence. (See Oakland
    
    Heritage, supra
    , 195 Cal.App.4th at p. 898.) "In reviewing the record for substantial
    evidence, we presume the agency's findings are correct and resolve all conflicts and
    reasonable doubts in favor of the findings." (Citizens for Positive Growth &
    Preservation v. City of Sacramento (2019) 
    43 Cal. App. 5th 609
    , 629.) Substantial
    evidence in a CEQA case is "enough relevant information and reasonable inferences from
    this information that a fair argument can be made to support a conclusion, even though
    other conclusions might also be reached. . . . Substantial evidence shall include facts,
    reasonable assumptions predicated upon facts, and expert opinion supported by facts."
    (Guidelines, § 15384, subds. (a) & (b).)
    2. The SEIR's consistency finding is not supported by substantial evidence
    a. Improper analysis of GPAs
    The SEIR's consistency finding is flawed because it makes unwarranted
    conclusions about GHG impacts from GPAs. For example, the SEIR states that projected
    GHG emissions from GPAs would be consistent with the Regional Plan because "the
    County provided SANDAG land use forecasts based on the GPU, which SANDAG then
    incorporated into the adopted Regional Plan" to create VMT projections that "align with
    the 2011 GPU." The defect in this analysis is that by definition, land uses allowed under
    the GPU do not include GPAs (which increase density or intensity of use beyond that
    94
    allowed under the GPU). Thus, if VMT projections are based on GPU land uses (as the
    County claims), then necessarily those projections exclude VMT from in-process GPAs.
    The County makes a similar error in contending that CAP GHG reduction
    measures will reduce VMT as contemplated in the Regional Plan. The CAP's GHG
    emission forecasts are based on land use allowed under the GPU only and assume that in-
    process and future GPAs will mitigate GHG emissions to zero above CAP projections
    under M-GHG-1. Therefore, the fact that the CAP itself is consistent with VMT
    reductions in the SCS does not support a finding that VMT impacts by in-process and
    future GPAs will be consistent with the Regional Plan.
    b. The County's GPA arguments are misleading
    Not only does the County make unwarranted conclusions about GHG impacts
    from GPAs, but when the County does address VMT impacts from GPAs, its arguments
    are misleading. For example, the County contends that the "SEIR also includes projected
    GHG emissions from [GPAs] approved through the time of the draft SEIR and
    reasonably foreseeable [GPAs] . . . which captured in broad strokes the GHG from VMT
    associated with these cumulative projects." However, the CAP's GHG projections
    include emissions only from those GPAs that the County had adopted between August
    2011 and August 2017. In other words, those GHG projections exclude emissions from
    the 21 in-process GPAs. The County's assertion that the SEIR includes GHG emissions
    from "reasonably foreseeable" GPAs is true only if "reasonably foreseeable" excludes in-
    process GPAs. Yet in its opening brief, the County concedes that in-process GPAs are
    "reasonably foreseeable."
    95
    In a related argument, the County states that GPU policies designed to reduce
    VMT also apply to GPAs. However, this too is misleading. Measures to reduce GHG
    emissions for projects with land use consistent with the GPU are found in the CAP. To
    the extent GPAs increase density or intensity of land use beyond that allowed under the
    GPU, those projects do not mitigate GHG emissions under the CAP, but rather under
    M-GHG-1. Indeed, in arguing that the CAP is consistent with the GPU, the County
    insisted on this very point—that "GPAs are not part of the project emissions of the CAP
    because they are part of the cumulative impact analysis in the SEIR." Therefore, the
    County's assertion—that GPU policies designed to reduce VMT also apply to GPAs—is
    true only to the limited extent that the GPA project's proposed land use is consistent with
    the GPU.
    The County also contends substantial evidence supports the SEIR's consistency
    finding because "future General Plan amendments are not part of the Project . . . ."
    However, the CAP is part of the Project—and the CAP's GHG emission projections
    assume that in-process and future GPAs will implement M-GHG-1 to mitigate GHG
    emissions to zero above CAP GHG targets.
    c. The consistency finding is properly considered
    Last, the County makes several arguments in an attempt to remove the entire issue
    of consistency with the Regional Plan from the case.
    First, the County contends Plaintiffs' argument improperly "conflate[s] VMTs with
    GHG emissions." However, "Generally, vehicle miles traveled is the most appropriate
    measure of transportation impacts." (Guidelines, §15064.3, subd. (a).) At oral argument,
    96
    the County also asserted that VMT is "just coming into play." However, VMT has often
    been used in California's regulation of air quality and GHG impacts:
    "California legislation related to air pollution began to refer to
    vehicle miles traveled measurements of traffic flows in the context
    of travel demand management in the 1990s. In 1988, enactment of
    [Assem. Bill No. 4420] (Sher) directed the California Energy
    Commission to study the potential impacts of global climate change
    on the state, including its transportation system.[] The Energy
    Commission's 1991 report, Global Climate Change: Potential
    Impacts and Policy Recommendation, suggested a broad range of
    policies and strategies for reducing greenhouse gases.[] The eighth
    of the Energy Commission's recommended strategies was 'Reducing
    vehicle miles traveled in personal vehicles, through promoting
    improved and expanded transportation alternatives, vehicle miles
    traveled fees, and other highway use fees. . . .' After publication of
    the California Energy Commission's 1991 report, reducing vehicle
    miles traveled was widely considered to be a potential regulatory
    means for greenhouse gas emission reduction." (Dorothy J. Glancy,
    Vehicle Miles Traveled and Sustainable Communities, 46 McGeorge
    L. Rev. 23, 52-53 (2014).)
    The County next contends that the SCS "does not require VMT reductions." But
    this assertion distorts the record. The Regional Plan states: "Reducing the number of
    miles that people travel in their cars is an important goal for our Regional Plan" and that
    "[l]and use decisions made at the local level can impact nearly all sources of emissions—
    for better and for worse. Development guided by smart growth principles—remember:
    more compact communities, less suburban sprawl—brings people closer to more
    destinations. It also encourages alternative travel choices, such as public transit,
    carpooling, walking and biking, which cut greenhouse gas emissions and other forms of
    pollution."
    97
    The County further contends it is SANDAG's obligation to make the Regional
    Plan consistent with the GPU, and not the SEIR's obligation to explain any
    inconsistencies with the Regional Plan. This argument is untenable. Guidelines section
    15125, subdivision (d) states that an EIR "shall discuss any inconsistencies between the
    proposed project and applicable . . . regional plans."
    Last, citing Environmental Council of Sacramento v. County of Sacramento (2020)
    
    45 Cal. App. 5th 1020
    (Environmental Council of Sacramento), the County asserts that
    CEQA does not require analysis of consistency with a sustainable communities strategy.
    In that case, the plaintiff challenged an EIR for failing to address whether it was
    consistent with the Sacramento Area Council of Government's (SACOG) metropolitan
    transportation plans/sustainable communities strategy (MTP/SCS). The Court of Appeal
    rejected that argument because plaintiff failed to (1) exhaust administrative remedies; and
    (2) "cite any evidence that a project must be evaluated under CEQA for consistency with
    an SCS." (Environmental Council of Sacramento, at p. 1037.) In contrast here, Plaintiffs
    exhausted administrative remedies. The SEIR acknowledges that "[m]any comments"
    expressed concern that proposed GHG reduction measures would not meet VMT
    reduction targets established by SANDAG's RTP/SCS. Moreover, unlike Environmental
    Council of Sacramento, here the SEIR does address consistency between the CAP and the
    RTP/SCS.
    Moreover, we disagree with the dicta in Environmental Council of 
    Sacramento, supra
    , 45 Cal.App.5th at page 1037 that CEQA does not require this consistency
    analysis. Sen. Bill No. 375 requires regional planning agencies to include a sustainable
    98
    communities strategy in their regional transportation plans. (Gov. Code, § 65080,
    subd.(b)(2)(B).) As noted, Guidelines section 15125, subdivision (d) provides that an
    EIR "shall discuss any inconsistencies between the proposed project and . . . regional
    plans. Such regional plans include . . . regional transportation plans." Accordingly,
    CEQA requires analysis of "any inconsistencies" between the Project and the Regional
    Plan.
    d. The impact of CARB's 2017 Scoping Plan
    The Regional Plan states, "Reducing the number of miles that people travel in
    their cars is an important goal for our Regional Plan." One of the five Regional Plan
    "building blocks" is implementing "measures designed to reduce the number of miles
    people travel in their vehicles." The Regional Plan consistently emphasizes the necessity
    for "[d]evelopment guided by smart growth principles . . . more compact communities,
    less suburban sprawl" to reduce GHG emissions to Sen. Bill No. 375 targets. Thus, the
    County's failure to analyze and disclose VMT impacts caused by GPAs threatens
    achieving state-mandated GHG emission reduction targets.
    The seriousness of this deficiency is underscored by the 2017 CARB Scoping
    Plan, which is the state's blueprint for meeting GHG emission reduction targets. (Center
    for Biological 
    Diversity, supra
    , 62 Cal.4th at p. 220.) The Scoping Plan recognizes that
    in the past, "development patterns have led to sprawling suburban neighborhoods, a vast
    highway system, growth in automobile ownership, and under-prioritization of
    infrastructure for public transit and active transportation." The Scoping Plan states,
    "VMT reductions are necessary to achieve the 2030 target and must be part of any
    99
    strategy evaluated in this Plan." (Italics added.) The Scoping Plan emphasizes that
    "California must reduce demand for driving" and "lower-VMT future development
    patterns are essential to achieving public health, equity, economic, and conservation
    goals."
    "Local land use decisions play a particularly critical role in
    reducing GHG emissions associated with the transportation
    sector . . . .
    "While the State can do more to accelerate and incentivize these
    local decisions, local actions that reduce VMT are also necessary to
    meet transportation sector-specific goals and achieve the 2030 target
    under [Sen. Bill No. 32.] Through developing the Scoping Plan,
    CARB staff is more convinced than ever that, in addition to
    achieving GHG reductions from cleaner fuels and vehicles,
    California must also reduce VMT." (Italics added.)
    VMT reduction is an integral part of California's strategy to reach 2030 and 2050
    GHG emission reduction targets. However, M-GHG-1 would potentially allow GPAs to
    mitigate 100 percent of their in-County GHG emissions by purchasing out-of-County
    (including international) originating offsets. In so doing, M-GHG-1 is inconsistent with
    the Regional Plan because it ignores whether GPAs are located consistent with smart
    growth policies.
    e. Failure to fulfill informational role
    " '[A]n EIR is required to provide the information needed to alert the public and
    the decision makers of the significant problems a project would create and to discuss
    currently feasible mitigation measures.' [Citation.] To fulfill the EIR's informational
    role, the discussion of the mitigation measures must contain facts and analysis, not bare
    conclusions and opinions. [Citation.] The level of detail CEQA requires in the EIR's
    100
    discussion of facts and analysis of the mitigation measures depends on 'whether the EIR
    includes enough detail "to enable those who did not participate in its preparation to
    understand and to consider meaningfully the issues raised by the proposed project.' "
    (King & Gardiner Farms, LLC v. County of Kern (2020) 
    45 Cal. App. 5th 814
    , 869.)
    The SEIR fails to comply with these informational standards. For example, at one
    place the SEIR claims no VMT analysis is even necessary because "M-GHG-1 would
    ensure that GPAs are mitigating their emissions such that they would not conflict with the
    Regional Plan and Sen. Bill No. 375 targets on this issue." This explanation—that it is
    unnecessary to consider whether GPAs using M-GHG-1 will increase VMTs because
    GPAs will use M-GHG-1—is meaningless.
    In a response to a comment, the SEIR also states it is too "speculative" to
    presuppose approval of future and proposed GPA projects, including the GHG emissions
    and VMT from these future projects. But this argument is untenable because, as noted
    ante in the cumulative impacts discussion, many of the in-process GPAs were well into
    the planning process, and yet the SEIR does not analyze or discuss VMT impacts of any
    of them. (See Banning 
    Ranch, supra
    , 2 Cal.5th at pp. 938-939.) "[T]here was no
    practical or reasonable barrier to [the] disclosure and inclusion" of projects currently
    under an agency's own environmental review." 
    (SFRG, supra
    , 151 Cal.App.3d at p. 74.)
    Even if more precise information may be available during project-specific review, the
    County must still provide reasonably obtainable information, or explain (supported by
    substantial evidence) why it cannot do so. "[I]f known impacts are not analyzed and
    101
    addressed in a program EIR, they may potentially escape analysis in a later-tier EIR."
    (Forest 
    Foundation, supra
    , 17 Cal.App.5th at p. 440.)
    V.
    THE SEIR FAILED TO ANALYZE A REASONABLE RANGE OF ALTERNATIVES
    A. Background
    An EIR "shall describe a range of reasonable alternatives to the project . . . which
    would feasibly attain most of the basic objectives of the project but would avoid or
    substantially lessen any of the significant effects of the project, and evaluate the
    comparative merits of the alternatives. An EIR need not consider every conceivable
    alternative to a project. Rather, it must consider a reasonable range of potentially feasible
    alternatives that will foster informed decisionmaking and public participation."
    (Guidelines, § 15126.6, subd. (a).)
    The SEIR analyzed four project alternatives:
    1. A no-project alternative, which assumed the CAP, GPA, GHG
    thresholds, and Guidelines for Significance would not be
    implemented;
    2. An "enhanced direct investment" alternative, in which the
    County would pursue the direct investment reduction measure
    (T-4.1) to a greater degree than currently proposed in the CAP, and
    without a renewable energy target;
    3. A 100 percent renewable energy alternative that would
    implement the CAP with increased reliance on renewable energy to
    meet GHG reduction targets;
    4. An alternative that would increase the solid waste diversion
    rate from 75 percent to 80 percent by 2030.
    102
    Although the CAP recognizes that on-road transportation is the largest source of
    GHG emissions in the County (45 percent of the GHG inventory), no alternative
    addresses VMT or transportation-related GHG emissions. Plaintiffs contend that the
    County violated CEQA by failing to consider smart-growth alternatives aimed at
    reducing VMT. As explained post, we agree.
    B. The SEIR's Discussion of Project Alternatives is Deficient
    The "core of an EIR is the mitigation and alternatives sections." (Citizens of
    Goleta 
    Valley, supra
    , 52 Cal.3d at p. 564.) An agency may not approve a project that
    will have significant environmental impacts if there are feasible alternatives that would
    substantially lessen those effects. (Pub. Resources Code, § 21002; Guidelines, §§ 15002,
    subd. (a)(3), 15021, subd. (a)(2).)
    " ' "There is no ironclad rule governing the nature or scope of the alternatives to be
    discussed other than the rule of reason." [Citation.] The rule of reason "requires the EIR
    to set forth only those alternatives necessary to permit a reasoned choice" and to
    "examine in detail only the ones that the lead agency determines could feasibly attain
    most of the basic objectives of the project." [Citation.] An EIR does not have to consider
    alternatives "whose effect cannot be reasonably ascertained and whose implementation is
    remote and speculative." ' [Citation.] A court will uphold the selection of project
    alternatives unless the challenger demonstrates ' "that the alternatives are manifestly
    unreasonable and that they do not contribute to a reasonable range of alternatives." ' "
    (Forest 
    Foundation, supra
    , 17 Cal.App.5th at p. 436.)
    103
    Examining alternatives begins with project objectives because it is these objectives
    that a proposed alternative must be designed to meet. (San Franciscans for Livable
    Neighborhoods v. City and County of San Francisco (2018) 
    26 Cal. App. 5th 596
    , 632.)
    The SEIR identifies these Project objectives:
    1. Reduce community and County operations GHG emissions to
    meet 2020 and 2030 reduction targets, and provide a mechanism to
    meet the County's 2050 goal;
    2. Identify GHG reduction strategies and measures that reduce
    GHG emissions from activities in the unincorporated areas;
    3. Update the General Plan and GPU to incorporate and reflect
    the GHG reduction targets, strategies, and measures for the reduction
    of GHG emissions because of buildout of the General Plan;
    4. Prepare a County baseline GHG emissions inventory, and
    analyze the potential growth of these emissions over time; and
    5. Establish a comprehensive approach to reduce County GHG
    emissions by incorporating feasible and effective GHG emission
    reduction measures.
    This court's decision in Forest 
    Foundation, supra
    , 
    17 Cal. App. 5th 413
    is closely
    on point and compels the conclusion that the SEIR's alternatives section violates CEQA.
    Forest Foundation involved a program EIR for SANDAG's 2011 RTP/SCS (called the
    2050 Regional Transportation Plan).44 (Forest Foundation, at pp. 421, 425.) That EIR
    analyzed GHG emissions impacts for years 2020, 2035, and 2050. (Id. at p. 430.) The
    44      The 2050 RTP/SCS was adopted in 2011 and included a sustainable communities
    strategy with transportation choices designed to reduce GHGs and meet state targets set
    following passage of Sen. Bill No. 375. SANDAG updated the 2050 RTP four years
    later, naming it the 2015 Regional Plan.
    104
    EIR analyzed seven project alternatives, none of which involved reducing VMT. (Id. at
    pp. 435-436.) This court held that omitting "an alternative which could significantly
    reduce total vehicle miles traveled is inexplicable given SANDAG's acknowledgement in
    its Climate Action Strategy that the state's efforts to reduce greenhouse gas emissions
    from on road transportation will not succeed if the amount of driving, or vehicle miles
    traveled, is not significantly reduced." (Id. at p. 436.) The court noted that the Climate
    Action Strategy explained that lowering VMT can be accomplished through improved
    land use and transportation planning. (Ibid.) The Climate Action Strategy recommended
    increased funding and system investments for public transit, increased service on existing
    routes, and infrastructure upgrades. (Id. at pp. 436-437.) We concluded, "Given these
    recommendations, their purpose, and their source, it is reasonable to expect at least one
    project alternative to have been focused primarily on significantly reducing vehicle trips."
    (Id. at p. 437.)
    Like the Climate Action Plan discussed in Forest 
    Foundation, supra
    , 
    17 Cal. App. 5th 413
    , here too SANDAG states the "heart" of the RTP/SCS is to lower GHG
    emissions "related to cars and light trucks" because "about a third of GHG emissions
    generation" are attributable to "that sector alone." The 2015 RTP/SCS states, "Reducing
    the number of miles that people travel in their cars is an important goal for our Regional
    Plan." The Scoping Plan states, "VMT reductions are necessary . . . and must be part of
    any strategy . . . ." CARB likewise states, "local actions that reduce VMT are also
    necessary to meet transportation sector-specific goals and achieve the 2030 target under
    Sen. Bill No. 32. . . . California must also reduce VMT." Indeed, CARB states, "It is
    105
    important that VMT reducing strategies are implemented early because more time is
    necessary to achieve the full climate, health, social, equity, and economic benefits from
    these strategies." Thus, CARB recommends that agencies "prioritize onsite design
    features that reduce emissions, especially from VMT . . . within the project's region. . . ."
    In light of this consistently clear mandate to reduce VMT to help achieve target
    GHG emission reductions, it is reasonable to expect at least one project alternative in the
    SEIR to have been focused primarily on significantly reducing VMT.45 (Forest
    
    Foundation, supra
    , 17 Cal.App.5th at p. 437.) The SEIR's failure to do so is prejudicial
    because it precludes informed public participation and decisionmaking. (Ibid.)
    Citing In re Bay-Delta Programmatic Environmental Impact Report Coordinated
    Proceedings (2008) 
    43 Cal. 4th 1143
    (Bay-Delta), the County contends that implementing
    a smart-growth alternative would be inconsistent with project objectives, one of which is
    to reduce GHG emissions from buildout of the General Plan, not an amended General
    Plan. Bay-Delta involved a project to restore the Bay-Delta's ecological health and
    improve management of Bay-Delta water for the various beneficial uses that depend on
    it. (Id. at pp. 1151-1152.) The Supreme Court held the failure to examine a program
    alternative requiring reduced water exports from the Bay-Delta was not an abuse of
    45     In its response to the Attorney General's amicus brief, the County contends Forest
    Foundation is distinguishable because that case concerned SANDAG's plan to reduce
    GHG emissions from cars and light duty trucks. However, that reads Forest Foundation
    too narrowly. As here, the RTP in Forest Foundation also included a SCS designed to
    promote "a more sustainable future by integrating land use, housing, and transportation
    planning to create a more sustainable, walkable, transit-oriented, compact development
    patterns and communities . . . ." (Forest 
    Foundation, supra
    , 17 Cal.App.5th at p. 429.)
    106
    discretion because that alternative would not achieve the objective of water supply
    reliability. (Id. at pp. 1163-1166.) In other words, an agency need not discuss
    alternatives that cannot achieve the project's underlying purpose. (Id. at p. 1165.)
    Here, Project objectives include (1) "[r]educe community and County operations
    GHG emissions . . . and provide a mechanism to meet the County's projected 2050 goal";
    (2) "[i]dentify GHG reduction strategies and measures that reduce GHG emissions from
    activities in the unincorporated areas"; (3) "[p]repare a County baselines GHG emissions
    inventory, which includes community and County operations emissions, and analyze the
    potential growth of these emissions over time"; and (4) establish a comprehensive
    approach to reduce County GHG emissions by incorporating feasible and effective GHG
    emission reduction measures." Bay-Delta is materially distinguishable because here, a
    smart growth alternative is consistent with achieving Project objectives.
    Moreover, it is impossible to take M-GHG-1 (and, therefore, GPAs) completely
    out of the CAP. As noted ante, the CAP achieves GHG reduction targets only by
    excluding from its projections in-process GPA GHG emissions above the CAP—on the
    assumption that GPAs will mitigate to zero-above-the-CAP under M-GHG-1. As a
    result, a project alternative based on reducing GHG emissions by implementing smart
    growth policies affecting GPAs is broadly consistent with CAP objectives.
    Further, the GPU "includes specific goals and policies aimed at reducing GHG
    emissions including growing in a compact and efficient manner, using energy more
    efficiently, harnessing renewable energy to power buildings, improving waste recycling,
    and improving access to sustainable transportation." The CAP, which is based on
    107
    buildout under the GPU, recognizes that "[g]iven that the largest source of emissions in
    the unincorporated county is the On-Road Transportation sector, the CAP proposes
    several measures . . . to reduce the number and length of vehicle trips." Thus, there is no
    conflict among (1) buildout under the GPU, (2) the CAP, and (3) an alternative that
    would encourage smart growth and associated reduced VMT.
    At oral argument, the County also asserted that the CAP is "not a land use plan,
    but an emissions reduction plan" and, therefore, project alternatives should also be
    focused on emission reduction, not land development as in a smart growth plan. This
    argument is untenable, however, because the County overstates the purported distinction
    between land use and GHG emissions. GHG emission reduction targeted by Assem. Bill
    No. 32 and other legislation is concerned with human activities contributing to climate
    change. To state the obvious, the amount of GHG emissions from agricultural land and
    open space will be vastly different if that same land contains 14,000 homes, roads, and
    infrastructure. Land use often drives GHG emission levels. Therefore, a smart growth
    land use alternative is reasonably related to GHG emission reduction.
    Also at oral argument, the County asserted that VMT reduction "was considered,"
    noting that the "first two" CAP GHG reduction measures involve reducing VMT.
    Counsel concluded, "When you're reducing VMT, you are offsetting an impact of a
    proposed project . . . we have a plan that is already an emissions reduction plan and it
    already includes VMT." However, on-road transportation accounts for 45 percent of the
    County's greenhouse gas inventory (as of 2014) and produced 1,456,060 MTCO2e. Yet
    the two CAP reduction measures counsel referenced are expected to collectively reduce
    108
    2030 GHG emissions by 8,101 MTCO2e, or less than 1 percent of the on-road
    transportation sector's contribution. Therefore, contrary to the County's contention, VMT
    reduction in the CAP is not tantamount to a smart growth project alternative.
    Finally, although this argument is not entirely clear, the County also contends its
    failure to include an alternative aimed at reducing VMT was compelled by this court's
    decision in Sierra Club 
    I, supra
    , 
    231 Cal. App. 4th 1152
    . This argument is untenable.
    Sierra Club I required the County to prepare the SEIR; however, we did not address the
    CEQA-required content of the alternatives section in it.
    VI.
    THE COUNTY ADEQUATELY RESPONDED TO COMMENTS ON THE DEIR
    A. Legal Principles
    Guidelines section 15088, subdivision (a) requires the agency to prepare a written
    response to "comments on environmental issues" from persons who reviewed the draft
    EIR. For "significant environmental issues raised" in such comments, the agency must
    "describe the disposition" of such issues (for example, revisions to the proposed project)
    in a "good faith, reasoned analysis in response." (Guidelines, § 15088, subd. (c).)
    "Conclusory statements unsupported by factual information will not suffice." (Ibid.)
    However, "the level of detail contained in the response . . . may correspond to the level of
    detail provided in the comment." (Ibid.) A response may be sufficient if it refers to parts
    of the draft EIR that analyzes the environmental impacts raised by the comment. (City of
    Irvine v. County of Orange (2015) 
    238 Cal. App. 4th 526
    , 550 (City of Irvine).) "A
    109
    general comment can be adequately met with a general response" and "[r]esponses need
    not be exhaustive." (Ibid.)
    B. Comments, Responses, and Analysis
    There are several hundred comments on the draft SEIR. The superior court
    singled out three as having inadequate responses. The County's opening brief challenges
    only these three rulings, and there is no cross-appeal challenging the adequacy of any
    other responses to comments. We discuss each of these three rulings next.
    Comment O-21-4: Sempra Services Corporation commented that the CAP focuses
    too little attention on reducing GHG emissions from the transportation sector.
    Response to Comment O-21-4: The County responded by stating, "Please see
    Master Response 9 and 6." Master Response 6 states in part, "Several comments assert
    that the County underutilizes opportunities to reduce emissions in the transportation
    sector, comparing the contribution of emissions from the transportation sector (45
    [percent]) to [the] proportion of overall reductions from the Built Environment and
    Transportation category (13 [percent]). . . . [¶] The County acknowledges the
    disproportionality. . . . However . . . the nature of the unincorporated county is low-
    density development that is not conducive to non-driving trips. . . . In addition the
    County has limited jurisdiction in controlling transportation emissions apart from land
    use and infrastructure planning. . . . While the nature of trips will likely continue to be
    personal vehicle based, the fuel source and emissions factors of those trips can be
    modified by switching to renewable sources including electricity. . . . In an effort to be
    responsive to these comments, the County has added Measure T-3.5 to install 2,040 Level
    110
    2 electric vehicle charging stations through public-private partnerships at priority
    locations in the unincorporated county by 2030. Electrifying VMT allows for the use of
    cleaner and renewable energy to power vehicles, and reduces GHG emissions associated
    with gasoline-powered internal combustion engines. Investment in a larger charging
    network than currently exists is needed to encourage EV use and achieve additional GHG
    reductions beyond State goals."
    Analysis of Response to Comment O-21-4: The response is adequate because it
    directly addresses the question, explains the disparity between GHG emissions reduction
    measures in transportation and electricity sectors, and describes revisions to the proposed
    project (adding measure T-3.5) to address the objection. (Guidelines, § 15088, subd. (c).)
    In ruling otherwise, the trial court erred by ignoring Master Response 6.
    Comment O-22-19: The Sierra Club commented that the SEIR should include a
    mitigation measure "of installing a car-parking system" that gives County employees
    "more choice over how they spend their wages, while significantly reducing the
    frequency of the choice of arriving at work in a single-occupancy vehicle."
    Response to Comment O-22-19: The County determined that unbundling the cost
    of parking from salaries would be infeasible because County employees work in diverse
    locations where parking is either free and plentiful or expensive and rare. Calculating a
    fair unbundled charge applicable to all County employees would be "virtually impossible
    under these varied conditions." The response also explained that "to institute such a
    policy would affect County employees' Terms and Conditions of Employment, which
    would require negotiation and agreement for each of the County's nine labor unions . . . .
    111
    The majority of the County's employees are currently covered by collective bargaining
    agreements, which are not open for negotiations until 2022. In addition, unbundling the
    cost of parking would require both elimination of subsidies paid to some classes of
    employees who park in paid lots, and charging employees who park for free in lots
    owned by the County. This would potentially affect employee income. . . . [¶]
    Additionally a policy to unbundle the cost of parking would need to be adopted for all
    County facilities to ensure equal opportunities, benefits, and access for County
    employees. However, this may have a disproportionate impact on employees that work
    at facilities in more rural areas of the County, where there is no or limited public
    transportation alternatives available."
    Analysis of Response to Comment O-22-19: This response is adequate because it
    explains why the lead agency's position disagrees with the recommendations and
    objection raised in the comment. (Guidelines, § 15088, subd. (c).) The response contains
    factual assertions (e.g., free or subsidized parking already provided; majority of County
    employees under a collective bargaining agreement; unbundling parking would affect
    employee compensation) and analysis based on those facts. The trial court erred in
    determining that this response was too conclusory.
    Comment L-4-3: SANDAG commented, "Please continue to take into
    consideration consistency with guiding plans for the region. . . .
    SANDAG . . . encourages smart, sustainable growth and reinforces principles set forth in
    SANDAG's Regional Plan."
    112
    Response to Comment -L4-3: In response, the County stated, "Section 2.10.4.2 of
    the Draft SEIR evaluated the CAP's consistency with guiding plans for the region."
    Analysis of Response to Comment L-4-3: SANDAG's comment that the County
    "take into consideration" consistency with regional guiding plans is simply an exhortation
    to comply with law. No response was necessary.
    VII.
    ISSUES INVOLVING EXHAUSTION OF ADMINISTRIVE REMEDIES
    "Exhaustion of administrative remedies is a jurisdictional prerequisite to
    maintenance of a CEQA action." (Bakersfield 
    Citizens, supra
    , 124 Cal.App.4th at
    p. 1199.) " 'That requirement is satisfied if "the alleged grounds for noncompliance with
    [CEQA] were presented . . . by any person during the public comment period provided by
    [CEQA] or prior to the close of the public hearing on the project before the issuance of
    the notice of determination." ' " (City of Long Beach v. City of Los Angeles (2018)
    
    19 Cal. App. 5th 465
    , 474.) " ' "To advance the exhaustion doctrine's purpose '[t]he ''exact
    issue" must have been presented to the administrative agency. . . ." (Forest 
    Foundation, supra
    , 17 Cal.App.5th at p. 446.) The issue raised administratively must be
    ' "sufficiently specific" ' so that the agency has the opportunity to evaluate and
    respond . . . ." (Ibid.)
    A. The Challenge to the SEIR's Alternatives Analysis was Exhausted
    The County contends that Plaintiffs did not adequately exhaust remedies with
    respect to the SEIR's alternative projects analysis. However, a February 2018 letter from
    Golden Door's attorneys to the County Board of Supervisors states in part, "The County
    113
    should also study a mitigation measure or alternative to limit General Plan Amendments
    to areas identified by SANDAG as 'smart growth' areas . . . . [I]t is vital to locate
    unplanned residential development in smart growth areas near transit and jobs. Changing
    land use patterns must favor smart growth over sprawl to be consistent with the
    RTP/SCS." (Italics added.) Raising similar issues, a January 2018 letter from Sierra
    Club's attorneys to the San Diego Planning Commission cites Forest 
    Foundation, supra
    ,
    
    17 Cal. App. 5th 431
    and states, " 'The omission of an alternative which could significantly
    reduce total vehicle miles traveled is inexplicable given SANDAG's
    acknowledgements . . . that the state's efforts to reduce greenhouse gas emissions from
    on-road transportation will not succeed if the amount of driving, or vehicle miles
    traveled, is not reduced.' "
    The purpose of requiring exhaustion is to afford an agency an opportunity to
    address contentions and possibly render litigation unnecessary. Here, that policy was
    fulfilled when Plaintiffs urged the County to consider an "alternative" to limit GPAs to
    "smart growth areas near transit and jobs" to be "consistent with the RTP/SCS."
    Plaintiffs' attorneys even cited one of the leading cases supporting their position. This is
    far from the perfunctory "skeleton showing" the County claims. Rather, Plaintiffs
    reasonably alerted the County to consider whether the SEIR violated CEQA by failing to
    analyze a smart-growth alternative aimed at reducing VMT.
    B. Environmental Justice
    Government Code section 65302 identifies required "elements" in a general plan.
    These include, among others, housing, conservation, open space, and noise. Effective in
    114
    2017, the Legislature amended this statute to require "[a]n environmental justice
    element . . . that identifies disadvantaged communities within the area covered by the
    general plan . . . ." (Gov. Code, § 65302, subd. (h)(1) [Stats. 2016, ch. 587 (Sen. Bill
    No. 1000), § 1.5].) The environmental justice element shall, among other things,
    "[i]dentify objectives and policies to reduce the unique or compounded health risks in
    disadvantaged communities by means that include, but are not limited to, the reduction of
    pollution exposure, including the improvement of air quality . . . ." (Gov. Code, § 65302,
    subd. (h)(1)(A).)
    Addressing similar concerns, the California Environmental Protection Agency is
    required to "[c]onduct its programs, policies, and activities that substantially affect
    human health or the environment in a manner that ensures the fair treatment of people of
    all races, cultures, and income levels, including minority populations and low-income
    populations of the state." (Pub. Resources Code, § 71110, subd. (a).) And under Assem.
    Bill No. 32, CARB "shall ensure that the greenhouse gas emission reduction rules,
    regulations, programs, mechanisms, and incentives under its jurisdiction, where
    applicable and to the extent feasible, direct public and private investment toward the most
    disadvantaged communities in California . . . ." (Health & Safe. Code, § 38565.)
    1. The SEIR
    In the superior court, Plaintiffs asserted that the SEIR does not adequately evaluate
    "impacts on environmental justice." The superior court agreed, ruling that the SEIR
    "failed to address environmental justice" by making "no attempt to disclose the increased
    health damage that could occur to the more vulnerable County residents (children, the ill,
    115
    and disadvantaged communities) from the project 'increasing nonattainment criteria
    pollutants' . . . , or from not requiring GHG offsets to be obtained in-County."
    In its opening brief, the County challenges this ruling—but only in a footnote
    under a heading entitled, "Petitioners Did Not Exhaust on Two Claims, Which Are
    Waived." That footnote states: "CEQA does not require environmental justice analysis."
    In support, the County cites Public Resources Code section 21083.1 (courts "shall not
    interpret this division or the state guidelines . . . in a manner which imposes procedural or
    substantive requirements beyond those explicitly stated in this division or in the state
    guidelines") and Berkeley Hillside Preservation v. City of Berkeley (2015) 
    60 Cal. 4th 1086
    , 1107, which states, "[T]he purpose of this statute was to 'limit judicial expansion of
    CEQA requirements.' " The footnote also asserts that "any unique adverse health burden
    from application of M-GHG-1 on disadvantaged communities would be too speculative
    to analyze as discussed in Section 
    C.1, supra
    ."
    On review of a CEQA action, our role is generally the same as the trial court.
    (State Water Resources Control Bd. Cases (2006) 
    136 Cal. App. 4th 674
    , 836 (Water
    Resources).) However, that means "only that we would not be bound by, or be required
    to show any deference to, the trial court's conclusion" on the environmental justice issue.
    (Ibid.) It does not mean that the County, as the appellant aggrieved by the trial court's
    determination, is entitled to seek reversal by relegating an issue to argument in a footnote.
    "Even when our review on appeal 'is de novo, it is limited to issues which have been
    adequately raised and supported in [the appellant's opening] brief. [Citations.] Issues not
    raised in an appellant's brief are deemed waived or abandoned.' " (Ibid.) To succeed
    116
    here, the County must first establish error. And even in a CEQA case, " '[t]he most
    fundamental rule of appellate review is that an appealed judgment or order is presumed to
    be correct.' [Citation.] It is the appellant who bears the burden of overcoming that
    presumption.' " (Ibid., italics omitted.)
    The County has forfeited this argument. (Hall v. Department of Motor Vehicles
    (2018) 
    26 Cal. App. 5th 182
    , 193 [argument in footnote forfeited]; Sabi v. Sterling (2010)
    
    183 Cal. App. 4th 916
    , 947 ["Footnotes are not the appropriate vehicle for stating
    contentions on appeal."]; Holden v. City of San Diego (2019) 
    43 Cal. App. 5th 404
    , 419-
    420 [same, collecting cases].) Indeed, the County's challenge to the trial court's
    environmental justice ruling is also forfeited because it is under a heading in the brief
    challenging only administrative exhaustion. (Provost v. Regents of University of
    California (2011) 
    201 Cal. App. 4th 1289
    , 1294 ["we do not consider all of the loose and
    disparate arguments that are not clearly set out in a heading and supported by reasoned
    legal argument"].) These well settled rules of appellate practice are not mere
    technicalities. They ensure that opposing parties are fairly apprised of contentions so as
    to afford a full and fair opportunity to respond.
    Although we have discretion to overlook this forfeiture, prudential concerns
    militate against doing so here. Whether CEQA may in some circumstances require an
    environmental justice analysis is at least reasonably arguable. (See generally, Alan
    Ramo, Environmental Justice as an Essential Tool in Environmental Review Statutes: A
    New Look at Federal Policies and Civil Rights Protections and California's Recent
    Initiatives, 19 Hastings W.-N.W. J. Envt'l. L. & Policy 41, 42 (2013) [noting that "[t]he
    117
    California Attorney General's recent litigation involving . . . global warming emissions[]
    affecting minority communities has sparked renewed interest in the relationship between
    environmental review laws and the doctrine of environmental justice."].) However, the
    County's brief lacks analysis from which our consideration of that issue could even
    begin.46
    2. Amendment to the General Plan
    In the superior court, Golden Door asserted that when the County amended GPU
    policy COS-20 and goal COS 20.1 in 2018, this triggered "a separate requirement" under
    Government Code section 65302 to adopt an environmental justice element in the general
    plan. The County contends Plaintiffs are precluded from making this assertion because it
    was not first made "during the administrative process."
    Assuming without deciding that the exhaustion doctrine applies to this non-CEQA
    issue, it is unnecessary to consider it because Plaintiffs have abandoned the point in the
    trial court. We have searched the trial court's 17-page single-spaced minute order and are
    unable to find any ruling on Plaintiffs' claim that the amendments to COS 20 and COS
    20.1 triggered the County's obligation to add an environmental justice element to the
    general plan. In ruling on a complex case such as this one, many things may be
    overlooked that would readily have been corrected had attention been called to them.
    46     Except to the extent that this opinion has law-of-the-case and/or claim or issue
    preclusion effect, we do not express any opinion on whether CEQA requires
    environmental justice review.
    118
    Where the court neither rules nor reserves its ruling for later, the party pressing the point
    must make some effort to have the court actually rule. "If the point is not pressed and is
    forgotten, [the party] may be deemed to have waived or abandoned it . . . ." (People v.
    Braxton (2004) 
    34 Cal. 4th 798
    , 813.)47
    C. Geographic Scope
    Guidelines section 15130, subdivision (b)(3) provides that an EIR's cumulative
    impacts analysis "should define the geographic scope of the area affected by the
    cumulative effect and provide a reasonable explanation for the geographic limitation
    used." Here, the SEIR states that the "cumulative impact analysis study area for GHG
    emissions" is the "entire unincorporated county and County local government
    operations." (Italics added.) The SEIR additionally states, "the issue of global climate
    change is inherently a cumulative issue" and, therefore, the geographical scope of the
    cumulative GHG analysis is global.
    The superior court ruled that the SEIR violates CEQA by using "a geographic
    scope that was inconsistent and alternated between a 'Countywide' geographic scope of
    cumulative GHGs and a 'global' geographic scope." The court also determined that "the
    issue of inconsistent geographic areas" was "exhausted."
    47     Therefore, it is unnecessary to consider the County's argument that even if
    Government Code section 65302 required adding an environmental justice element to the
    General Plan, one was not required because "there were no disadvantaged communities in
    the unincorporated County" when the County prepared the SEIR. This disposition also
    renders moot the County's request for judicial notice of General Plan 2017 Guidelines
    published by the Office of Planning and Research.
    119
    The County contends this claim was never presented during administrative
    proceedings. Plaintiffs do not address this issue in their appellate briefs.48 However, in
    the trial court Golden Door asserted it raised the point in letters dated (1) January 16,
    2018, expressing "concern[] about the CAP's mitigation measure for cumulative GHG
    impacts caused by General Plan Amendment projects"; (2) February 8, 2018, raising
    numerous objections to M-GHG-1; (3) February 13, 2018, objecting to various aspects of
    M-GHG-1; and (4) September 25, 2017, asserting that the CAP must provide assurances
    that the offset projects will achieve projected reductions.
    To advance the exhaustion doctrine's purpose "[t]he 'exact issue' must have been
    presented to the administrative agency . . . ." [Citation.] While ' "less specificity is
    required to preserve an issue for appeal in an administrative proceeding than in a judicial
    proceeding" ' . . . 'generalized environmental comments at public hearings,'
    'relatively . . . bland and general references to environmental matters' [citation] or
    'isolated and unelaborated comment[s]' [citation] will not suffice.' " (Sierra Club v. City
    of Orange (2008) 
    163 Cal. App. 4th 523
    , 535-536.) Here, the cited letters contain general
    criticisms of and objections to M-GHG-1. But none states that the DSEIR violates
    CEQA by having an inconsistent geographical scope. Accordingly, the trial court erred
    in determining this issue was exhausted. Necessarily, therefore, the court should not have
    48     We nevertheless consider the point because a respondent's failure to address an
    issue raised in the opening brief is not a concession. (Griffin v. The Haunted Hotel, Inc.
    (2015) 
    242 Cal. App. 4th 490
    , 505.)
    120
    reached the merits. Accordingly, the ruling that the SEIR's cumulative GHG impacts
    discussion contains an inconsistent and flawed geographical scope must also be reversed.
    VIII.
    ENERGY ISSUE RULING FORFEITED
    The trial court ruled that the County "failed to analyze potential energy impacts
    that may result from GPAs and strategies to reduce energy impacts on such project sites"
    and also "failed to evaluate the reasonably foreseeable impacts on energy usage in
    allowing increased VMTs in exchange for GHG reduction through offsets." In a footnote
    in its brief, Golden Door contends the County has forfeited this issue on appeal by failing
    to address it in the opening brief. The County asserts that Golden Door itself has
    forfeited the waiver argument by making it only in a footnote.
    Since the trial court's judgment is presumed correct, it is the appellant's burden to
    establish error. (Water 
    Resources, supra
    , 136 Cal.App.4th at p. 836.) The County's
    failure to address the energy impacts ruling in its opening brief compels the conclusion
    the trial court's ruling on that point must be affirmed.49
    49      Golden Door also asserts (again, in a footnote) that the County did not raise any
    issue in its opening brief that M-GHG-1 is or is not mandatory. We agree with the
    County that it is unclear what Golden Door claims to be forfeited and, therefore, do not
    consider the point further.
    121
    IX.
    INCONSISTENCY BETWEEN THE CAP AND SEIR
    The SEIR must explain project impacts in a manner "reasonably calculated to
    inform the public . . . ." (Sierra 
    Club, supra
    , 6 Cal.5th at p. 520.) The CAP states that its
    2014 inventory of GHG emissions does not include emissions from GPAs that were
    adopted, but not constructed, as of 2014:
    "Even though there were GPAs that were adopted between 2011
    (adoption of 2011 General Plan Update) and 2014 (inventory
    baseline year), none of these GPAs were constructed by 2014 and;
    therefore, their GHG emissions are not included in the 2014
    inventory. The 2014 inventory is based on emissions-generating
    activities that existed on the ground in 2014." (Italics added.)
    However, a portion of the SEIR states that the CAP's GHG emissions inventory
    includes GPAs adopted between August 2011 and March 28, 2017:
    "[T]he Draft CAP's GHG inventory includes GPAs adopted
    between August 2011 (adoption of 2011 GPU) and March 28, 2017
    (date at which the inventory technical reports were prepared)."
    (Italics added.)
    These are inconsistent. The first states that the inventory excludes GPAs not
    constructed by 2014. The second states that the inventory includes GPAs adopted by
    March 2017.50
    To avoid inconsistency, the County contends we should read "inventory" as used
    in the first quotation (from the CAP) to mean projected future GHG emissions. This
    50      We discovered this inconsistency on our own and invited supplemental briefs on
    the issue, which we have considered.
    122
    argument is untenable, however, because "inventory" is consistently used in the CAP and
    elsewhere in the SEIR to mean existing emissions, not future projections.
    X.
    REMEDIES
    For the first time in its reply brief, and citing Public Resources Code section
    21168.9, the County contends that even if M-GHG-1 violates CEQA, we should
    "nonetheless allow the CAP to stand under CEQA's provisions for severable remedies.51
    The County asserts this remedy is particularly appropriate here because the CAP is not
    "tainted by any CEQA violation found with respect to M-GHG-1" and "M-GHG-1 is not
    required for the CAP . . . ." This argument fails for two reasons. First, the County has
    forfeited this argument by not asserting it in the opening brief. "We will not ordinarily
    consider issues raised for the first time in a reply brief. [Citation.] An issue is new if it
    51      Public Resources Code section 21168.9 provides in part: "(a) If a court
    finds, . . . that any determination, finding, or decision of a public agency has been made
    without compliance with this division, the court shall enter an order that includes one or
    more of the following: [¶] (1) A mandate that the determination, finding, or decision be
    voided by the public agency, in whole or in part. [¶] . . . [¶] (3) A mandate that the
    public agency take specific action as may be necessary to bring the determination,
    finding, or decision into compliance with this division. [¶] (b) Any order pursuant to
    subdivision (a) shall include only those mandates which are necessary to achieve
    compliance with this division and only those specific project activities in noncompliance
    with this division. The order shall be made by the issuance of a peremptory writ of
    mandate specifying what action by the public agency is necessary to comply with this
    division. However, the order shall be limited to that portion of a determination, finding,
    or decision or the specific project activity or activities found to be in noncompliance only
    if a court finds that (1) the portion or specific project activity or activities are severable,
    (2) severance will not prejudice complete and full compliance with this division, and (3)
    the court has not found the remainder of the project to be in noncompliance with this
    division."
    123
    does more than elaborate on issues raised in the opening brief or rebut arguments made
    by the respondent in respondent's brief. Fairness militates against allowing an appellant
    to raise an issue for the first time in a reply brief because consideration of the issue
    deprives the respondent of the opportunity to counter the appellant by raising opposing
    arguments about the new issue." (American Indian Model Schools v. Oakland Unified
    School Dist. (2014) 
    227 Cal. App. 4th 258
    , 275-276.)
    Moreover, even if not forfeited, we would reject the argument. " 'Directing an
    agency to void its approval of the project is a typical remedy . . . for a CEQA violation.' "
    (John R. Lawson Rock & Oil, Inc. v. State Air Resources Bd. (2018) 
    20 Cal. App. 5th 77
    ,
    102.) As explained ante, to the extent the CAP's GHG emission projections for GPAs
    assume mitigation to zero or net zero under M-GHG-1, the CAP's projection is
    unsupported by substantial evidence. Severing the CAP from M-GHG-1 would not result
    in "complete and full compliance" with CEQA and is, therefore, not authorized by Public
    Resources Code section 21168.9, subdivision (b).
    Citing POET, LLC v. State Air Resources Bd. (2013) 
    218 Cal. App. 4th 681
    (POET), the County contends the court should allow the CAP to remain in effect even if
    M-GHG-1 is invalid. At oral argument, the County asserted that "all of the work that
    went into the CAP is something that should be preserved."
    We disagree. The CAP's strategies and measures are designed to reduce GHG
    emissions for build-out under the GPU. The CAP does so by (1) calculating a baseline
    GHG emissions level as of 2014; and (2) estimating future GHG emissions under a
    124
    business as usual standard; and (3) implementing state mandated GHG reduction targets.
    If any one of these calculations is erroneous, the CAP fails to accomplish its purpose.
    In addition to the inconsistency between the CAP and SEIR discussed ante in part
    IX, the problem here is with the CAP's GHG projections. The projections assume that
    in-process and future GPAs will mitigate to zero-above-the-CAP under M-GHG-1.
    Because M-GHG-1 is invalid, these projections are not accurate. There is no assurance
    that in-process and future GPAs will in fact mitigate to net zero. Thus, there is no
    evidence that the CAP's reduction measures will achieve the stated reduction targets,
    even for projects consistent with the GPU. In sum, it is impossible to surgically excise
    M-GHG-1 from the CAP to produce a valid stand-alone climate action plan.
    The County's reliance on POET is not persuasive. There, the CEQA project was a
    statewide regulation concerning low carbon fuel standards. CARB's low carbon fuel
    standards regulations satisfied "a vast majority of the applicable legal requirements, but
    ran afoul of several procedural requirements . . . ." 
    (POET, supra
    , 217 Cal.App.4th at
    p. 697.) The appellate court determined that in the "extraordinary case" before it,
    suspending the fuel standards regulations would do more environmental harm than
    allowing them to remain in effect pending the completion of CARB's corrective action.
    (Id. at pp. 697, 761.) Accordingly, the appellate court exercised its inherent equitable
    authority to maintain the status quo and allow the regulations to remain operative. (Id. at
    p. 761.)
    Unlike POET, the CEQA defect in the CAP is not procedural. The CAP is
    substantively flawed because its projections depend upon the validity of M-GHG-1 to
    125
    reduce GHG emissions for probable in-process and all future GPAs to zero-above-the-
    cap, and M-GHG-1 itself is invalid under CEQA.
    XI.
    NO SPECIAL MASTER
    Citing Legislature of California v. Reinecke (1973) 
    9 Cal. 3d 166
    and Wilson v. Eu
    (1991) 
    54 Cal. 3d 471
    , Golden Door asks us to appoint a special master to "work with all
    interested parties to assure the County expeditiously prepares an adequate CAP and
    accompanying SEIR . . . ." However, both cited cases involve legislative impasse in
    enacting reapportionment plans. The Court intervened in those cases and appointed
    special masters because the legislative impasse might continue indefinitely, the Court's
    duty to ensure equal protection of the laws was implicated, and electoral rights would be
    irretrievably lost if no action were taken. (Wilson, at p. 473.) Especially given the
    existing injunction prohibiting the County from relying on M-GHG-1 during CEQA
    review of GHG emissions impacts of development proposals on unincorporated County
    lands, similar exigent circumstances are lacking here.
    XII.
    THE COURT DECLINES TO PROVIDE AN ADVISORY OPINION
    Citing no authority, Sierra Club asks that we provide "a clear declaration that no
    out-of-County offsets are permitted under the current General Plan. Sierra Club also asks
    that we "further declare that before the County could reauthorize out-of-County offsets,
    the County would have to adequately analyze the direct and cumulative impacts of such a
    program under CEQA, determine that in-County reductions are not available and cannot
    126
    be made available through a County or APCD program, and conduct the appropriate
    process to amend its General Plan."
    Essentially, Sierra Club's request is for advisory opinions on mitigation measures
    and environmental analysis not before us in this case. It remains to be seen how the
    County will amend the CAP, the SEIR, and M-GHG-1 to comply with this opinion.
    Accordingly, we decline to issue advisory opinions to forestall hypothetical events that
    may never occur. (Teachers' Retirement Bd. v. Genest (2007) 
    154 Cal. App. 4th 1012
    ,
    1044.)
    XIII.
    SUMMARY OF HOLDINGS
    A. The 2018 Climate Action Plan (CAP)
    The CAP is not inconsistent with the General Plan. Nevertheless, the judgment
    requiring the County to set aside and vacate its approval of the CAP is affirmed because
    the CAP's greenhouse gas emission projections assume effective implementation of
    M-GHG-1, and M-GHG-1 is itself unlawful under CEQA. Except to the extent that (1)
    the CAP is impacted by its reliance on M-GHG-1; and (2) the CAP's inventory of
    greenhouse gases is inconsistent with the SEIR (see holding (C)(4) post), the CAP is
    CEQA-compliant.
    B. M-GHG-1 is Invalid under CEQA
    Generally speaking, CEQA permits mitigation measures for GHG emissions to
    include offsite measures, including purchasing offsets. However, M-GHG-1 violates
    CEQA because M-GHG-1 does not require that (1) offset protocols meet Assem. Bill
    127
    No. 32 criteria as established in the California Code of Regulations, title 17, section
    95972; (2) greenhouse gas emission reductions achieved are additional within the
    meaning of Health and Safety Code section 38562, subdivisions (d)(1) and (d)(2) and
    California Code of Regulations, title 17, section 95802, subdivision (a); and (3) offsets
    originating outside California have GHG emissions programs equivalent to or stricter
    than California's program.
    Additionally, M-GHG-1 violates CEQA because (1) it would allow a project
    applicant to offset 100 percent of its GHG emissions through offset projects originating
    outside of California; and (2) it allows a County official to determine whether any
    particular offset program is feasible and otherwise appropriate, with no objective criteria
    to guide the exercise of that discretion. M-GHG-1, therefore, lacks performance
    standards to ensure the mitigation goal will be achieved. Therefore, the judgment
    directing the County to set aside and vacate its approval of the CAP and SEIR is
    affirmed.
    C. SEIR Holdings
    1. The cumulative impacts analysis violates CEQA
    The SEIR's cumulative impacts analysis violates CEQA because it excludes GHG
    impacts from in-process GPAs.
    2. The finding that M-GHG-1 is consistent with the Regional Plan is not
    supported by substantial evidence
    128
    The SEIR's finding that M-GHG-1 is consistent with the Regional Plan is not
    supported by substantial evidence. Therefore, the County abused its discretion in
    certifying the SEIR. (Golden Door 
    I, supra
    , 27 Cal.App.5th at p. 901.)
    3. The failure to analyze a smart-growth alternative
    The SEIR violates CEQA because it fails to analyze a smart-growth alternative to
    the Project.
    4. Inconsistency with the CAP
    The CAP and SEIR are inconsistent with each other. The CAP states that its 2014
    inventory of GHG emissions excludes emissions from GPAs that were adopted, but not
    constructed as of 2014. However, the SEIR states that the same inventory includes GPAs
    adopted between August 2011 and March 28, 2017.
    For these additional reasons, the judgment directing the County to set aside and
    vacate its approval of the CAP and SEIR is affirmed.
    5. Thirty-year shelf-life
    The SEIR adequately discloses that M-GHG-1 requires offsets for only 30 years.
    6. Response to comments
    The County's response to comments on the DSEIR is adequate.
    7. Geographic scope
    The trial court erred in determining that the SEIR contains an inconsistent
    geographic scope because Plaintiffs failed to adequately exhaust administrative remedies
    on that issue (see below).
    129
    D. Exhaustion of Remedies
    Plaintiffs adequately exhausted administrative remedies on all issues addressed by
    the trial court except that of geographical scope.
    E. Environmental Justice Holdings
    The County has forfeited the argument that the trial court erred in determining that
    the SEIR violates CEQA by failing to address environment justice impacts.
    Plaintiffs have forfeited the argument that the 2011 amendment to the General
    Plan triggered a separate requirement to adopt an environmental justice element in the
    general plan.
    F. Energy Impacts
    The County has forfeited any argument that the trial court erred in determining
    that the SEIR failed to adequately analyze impacts to energy from GPAs and increased
    VMTs in exchange for GHG reduction through offsets.
    G. No Special Master Nor Advisory Opinion
    The court declines to (1) appoint a special master to oversee CEQA compliance on
    remand; and (2) issue an advisory opinion regarding CEQA compliance.
    DISPOSITION
    The trial court erred in determining that (1) the CAP is inconsistent with the GPU;
    (2) the County's response to comments violates CEQA; and (3) the SEIR has an
    inconsistent geographical scope for cumulative impacts.
    The trial court did not err in concluding that "during CEQA review of GHG
    emissions impacts of development proposals on unincorporated County lands and the
    130
    issuance of any permits or entitlements for any General Plan amendment projects
    approved on or after February 14, 2018, the County, its agencies, agents, employees,
    representatives, supervisors, or other personnel should not have relied on Mitigation
    Measure M-GHG-1, which is contained within the County of San Diego Supplement to
    the 2011 General Plan Update Program Environmental Impact Report, dated January
    2018."
    The trial court also did not err in issuing a writ of mandate directing the County to
    set aside and vacate the February 14, 2018, approvals of the 2018 Climate Action Plan
    and the certification of the Final Supplemental Environmental Impact Report and
    approvals listed as specified in the final judgment filed January 16, 2019.
    Furthermore, the trial court did not err in issuing an injunction stating that during
    review of GHG emission impacts of development proposals on unincorporated County
    lands under CEQA, including the review of such impacts prior to the issuance of any
    permits or entitlements for any General Plan amendment projects approved on or after
    February 14, 2018, the County, its agencies, agents, employees, representatives,
    supervisors, or other personnel, shall not rely on Mitigation Measure M-GHG-1.
    Additionally, because M-GHG-1 is invalid under CEQA, the trial court did not err
    in declaring that the February 2018 Climate Action Plan and the certification of the Final
    SEIR to the 2011 General Plan Update Program EIR are legally inadequate and may not
    be used to provide the basis for CEQA review of GHG impacts of development proposals
    in the unincorporated County.
    131
    Because the final judgment is expressly based on findings and determinations
    made in the trial court's December 24, 2018 minute order, on remand the trial court is
    directed to (1) amend that minute order; (2) issue a new writ of mandate, injunction, and
    judgment; and (3) conduct further proceedings—all of which are to be consistent with
    this opinion. In the interests of justice, the parties shall bear their own costs on appeal.
    (Cal. Rules of Court, rule 8.278(a)(5).)
    IRION, J.
    WE CONCUR:
    McCONNELL, P. J.
    HUFFMAN, J.
    APPENDIX 1
    132
    Assembly Bill No. 32 .................................. Global Warming Solutions Act of 2006
    APCD........................................................................... Air Pollution Control District
    CAP ........................................................................................... Climate Action Plan
    CAPCOA .............................. California Air Pollution Control Officers Association
    CAPCOA GHG Rx ................................... California Air Pollution Control Officers
    Association Greenhouse Gas Reduction Exchange
    CARB ...................................................................... California Air Resources Board
    CARB Protocol .............................. Compliance Offset Protocols adopted by CARB
    CHECKLIST .......................................................... The CAP Consistency Checklist
    EIR .............................................................................. Environmental Impact Report
    MTCO2e................................................................ A measure of the global warming
    potential of a greenhouse gas
    DSEIR ................................................................ Draft Environmental Impact Report
    GHG.................................................................................................. Greenhouse Gas
    GPA ..................................................... A proposed project requiring a General Plan
    amendment because of increased density or intensity
    of land use beyond that allowed under the GPU
    GPU ..................................................................................2011 General Plan Update
    M-GHG-1 .....................................................Mitigation Measure Greenhouse Gas-1
    MPO.................................................................. Metropolitan Planning Organization
    OPR ....................................................................................... Offset Project Registry
    PEIR............................................................. Program Environmental Impact Report
    RTP (aka Regional Plan) ............................................. Regional Transportation Plan
    SANDAG .................................................... San Diego Association of Governments
    133
    Senate Bill No. 32 ........................................ 2016 legislation setting GHG reduction
    goal of 40% below 1990 level
    Senate Bill No. 375 ............................................ 2008 Sustainable Communities and
    Climate Protection Act
    SEIR..................................................... Supplemental Environmental Impact Report
    SCS ......................................................................Sustainable Communities Strategy
    VMT ..................................................................................... Vehicle Miles Traveled
    APPENDIX 2
    134
    "CAP Mitigation Measure M-GHG-1: The County shall require in-process and
    future GPAs to reduce their emissions to ensure that CAP emission forecasts are not
    substantially altered such that attainment of GHG reduction targets could not be achieved
    Project applicants for in-process and future GPAs could accomplish this through two
    options, as outlined below.
    "Option 1 (No Net Increase): GPA project applicants shall achieve no net increase
    in GHG emissions from additional density above the 2011 GPU. Applicants shall be
    required in their respective CEQA documents to quantify the GHG emissions from their
    projects that exceed the GHG emissions for the 2011 GPU density or intensity forming
    the basis of the CAP emission forecasts (i.e., projections). This increase in emissions
    shall be reduced through onsite design features and mitigation measures and offsite
    mitigation, including purchase of carbon offset credits by the applicant. Applicants shall
    demonstrate compliance with relevant CAP measures as identified in the "CAP
    Consistency Review Checklist" in addition to all feasible onsite design features and
    mitigation measures. Offsite mitigation, including purchase of carbon offset credits,
    would be allowed after all feasible onsite design features and mitigation measures have
    been incorporated.
    "For example, if 400 residential units were allowed under the 2011 GPU and a
    GPA proposes 500 residential units, the emissions for the additional 100 units would be
    calculated and offset through compliance with the CAP Consistency Review Checklist
    and additional feasible onsite measures and offsite measures, including the use of carbon
    offsets. The emissions associated with the allowable density of 400 units would be
    mitigated through compliance with the CAP Consistency Review Checklist.
    "The County will consider, to the satisfaction of the Director of Planning
    Development Services (PDS), the following geographic priorities for GHG reduction
    features and GHG reduction projects and programs: 1) project design features/onsite
    reduction measures; 2) offsite within the unincorporated areas of the County of San
    Diego; 3) offsite within the County of San Diego; 4) offsite within the State of California;
    5) offsite within the United States; and 6) offsite internationally.
    "Geographic priorities would focus first on local reduction features (including
    projects and programs that would reduce GHG emissions) to ensure that reduction efforts
    achieved locally would provide co-benefits. Depending on the carbon offset credit
    utilized, co-benefits may include reductions in criteria air pollutants, toxic air
    contaminants, energy demand, water consumption, health benefits, social benefits, and
    economic benefits. The GPA applicant or its designee shall first pursue offset projects
    and programs locally within unincorporated areas of the County of San Diego to the
    extent such carbon offset credits are available and are financially feasible, as reasonably
    determined by the Director of PDS.
    135
    "If carbon offset credits are provided as mitigation, the GPA applicant, or its
    designee, shall purchase and retire carbon offsets in a quantity sufficient to offset the net
    increase from GHG emissions above the density or intensity allowed in the 2011 GPU.
    This includes all GHG emissions from construction (including sequestration loss from
    vegetation removal) and operations.
    "For the net increase of construction and operations GHG emissions prior to
    County's issuance of the project's first grading permit (for construction GHG emissions)
    or first building permit (for operations GHG emissions) the GPA applicant, or its
    designee, shall provide evidence to the satisfaction of the Director PDS that the project
    applicant or its designee has purchased and retired carbon offsets credits in a quantity
    sufficient to offset the net increase of construction and operations GHG emissions
    generated by the project. Operations emissions may be offset in phases commensurate
    with the overall phasing of the project.
    "Carbon offset credits must be purchased through any of the following: (i) a
    CARB-approved registry, such as the Climate Action Reserve, the American Carbon
    Registry, and the Verified Carbon Standard, (ii) any registry approved by CARB to
    act as a registry under the state's cap and trade program, (iii) through the CAPCOA GHG
    Rx and the SDAPCD, or (iv) if no registry is in existence as identified in options (i), (ii).
    or (iii) above, then any other reputable registry or entity that issues carbon offsets
    consistent with Cal Health & Saf. Code section 38562(d)(1)), to the satisfaction of the
    Director of PDS.
    "Option 2 Net Zero: GPA project applicants shall reduce all project GHG
    emissions to zero to achieve no net increase over baseline conditions (carbon neutrality).
    Project emissions shall be reduced to zero through onsite design features and mitigation
    measures and offsite mitigation, including purchase of carbon offset credits by the
    applicant or its designee. Applicants shall demonstrate compliance with relevant CAP
    measures as identified in the 'CAP Consistency Review Checklist' before considering
    additional feasible onsite design features and mitigation measures. Offsite mitigation,
    including purchase of carbon offset credits would be allowed after all feasible onsite
    design features and mitigation measures have been incorporated.
    "The County will consider to the satisfaction of the Director of Planning &
    Development Services (PDS), the following geographic priorities for GHG reduction
    features, and GHG reduction projects and programs: 1) project design features/onsite
    reduction measures; 2) offsite within the unincorporated areas of the County of San
    Diego; 3) offsite within the County of San Diego; 4) offsite within the State of California;
    5) offsite within the United States; and 6) offsite internationally.
    "Geographic priorities would focus first on local reduction features (including
    projects and programs that would reduce GHG emissions) to ensure that reduction efforts
    achieved locally would provide co-benefits. Depending on the carbon offset credit
    136
    utilized, co-benefits may include reductions in criteria air pollutants, toxic air
    contaminants, energy demand, water consumption, health benefits, social benefits, and
    economic benefits. The GPA applicant or its designee shall first pursue offset projects
    and programs locally within unincorporated areas of the County of San Diego to the
    extent such carbon offset credits are available and are financially feasible, as reasonably
    determined by the Director of PDS.
    "If carbon offset credits are provided as mitigation, the GPA applicant, or its
    designee, shall purchase and retire carbon offsets in a quantity sufficient to offset all
    GHG emissions from the project. This includes all GHG emissions from construction
    (including sequestration loss from vegetation removal) and operations.
    "Prior to the County's issuance of the project's first grading permit (for
    construction GHG emissions) or first building permit (for operations GHG emissions) the
    GPA applicant, or its designee, shall provide evidence to the satisfaction of the Director
    of PDS that the project applicant or its designee has purchased and retired carbon offset
    credits in a quantity sufficient to offset all construction and operations GHG emissions
    generated by the project. Operations emissions may be offset in phases, commensurate
    with the overall phasing of the project.
    "Carbon offset credits must be purchased through any of the following: (i) a
    CARB-approved registry, such as the Climate Action Reserve, the American Carbon
    Registry, and the Verified Carbon Standard, (ii) any registry approved by CARB to act as
    a registry under the state's cap and trade program, (iii) through the CAPCOA GHG Rx
    and the SDAPCD, or (iv) if no registry is in existence as identified in options (i), (ii). or
    (iii) above, then any other reputable registry or entity that issues carbon offsets consistent
    with Cal Health & Saf. Code section 38562(d)(1)), to the satisfaction of the Director of
    PDS."
    137