effects of other current projects, and the effects of probable future (Ibid., projects.’ ” quoting § 21083, subd. (b)(2).) the global scope of climate change and the fact “Second, 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 global rather than (Id. at pp. 219-220.) local.” In recognition of the difficulty, and importance, of evaluating global climate change impacts, the Legislature directed the California Natural Resources Agency to adopt CEQA Guidelines for the mitigation of greenhouse gas emissions. (§ 21083.05.) Those guidelines grant agencies to determine, in the context of a particular “discretion project, whether to: [¶] (1) Use a model or methodology to quantify greenhouse gas emissions resulting from a project, and which model to use . . . and/or [¶] (2) Rely on a qualitative analysis or performance based (CEQA Guidelines, § 15064.4, standards.” subd. (a).) Utilizing the second method, an agency may adopt an area wide plan to reduce greenhouse gas emissions and determine that a incremental contribution to project’s climate change is not significant if the project complies with the requirements of the previously adopted plan. (CEQA Guidelines, § 15183.5, subd. (b).) The Bay Area Air Quality Management District (Air District) encourages local agencies to adopt greenhouse gas reduction plans and to use those plans in making CEQA determinations. In its May 2010 CEQA Guidelines update, the Air District stated: a “If project is consistent with an adopted Qualified Greenhouse Gas Reduction Strategy that addresses the greenhouse gas emissions, it can be presumed that the project will project’s not have significant [greenhouse gas] emission impacts.” In 2010, San Francisco adopted its greenhouse gas strategy. The greenhouse gas strategy is a 321-page document with multiple elements based on the California Natural Resources Agency CEQA Guidelines and the Air of those District’s interpretation guidelines. San greenhouse gas strategy includes a quantification of baseline Francisco’s levels of greenhouse gas emissions and planned reductions from the baseline 1990 level of 25 percent less emissions by 2020, 40 percent less by 2025 and 80 percent less by 2050. The Air District approved San greenhouse gas strategy and found that, Francisco’s
effects of other current projects, and the effects of probable future projects.’ ” (Ibid., quoting § 21083, subd. (b)(2).) “Second, the 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 global rather than local.” (Id. at pp. 219-220.) In recognition of the difficulty, and importance, of evaluating global climate change impacts, the Legislature directed the California Natural Resources Agency to adopt CEQA Guidelines for the mitigation of greenhouse gas emissions. (§ 21083.05.) Those guidelines grant agencies “discretion to determine, in the context of a particular project, whether to: [¶] (1) Use a model or methodology to quantify greenhouse gas emissions resulting from a project, and which model to use . . . and/or [¶] (2) Rely on a qualitative analysis or performance based standards.” (CEQA Guidelines, § 15064.4, subd. (a).) Utilizing the second method, an agency may adopt an area wide plan to reduce greenhouse gas emissions and determine that a project’s incremental contribution to climate change is not significant if the project complies with the requirements of the previously adopted plan. (CEQA Guidelines, § 15183.5, subd. (b).) The Bay Area Air Quality Management District (Air District) encourages local agencies to adopt greenhouse gas reduction plans and to use those plans in making CEQA determinations. In its May 2010 CEQA Guidelines update, the Air District stated: “If a project is consistent with an adopted Qualified Greenhouse Gas Reduction Strategy that addresses the project’s greenhouse gas emissions, it can be presumed that the project will not have significant [greenhouse gas] emission impacts.” In 2010, San Francisco adopted its greenhouse gas strategy. The greenhouse gas strategy is a 321-page document with multiple elements based on the California Natural Resources Agency CEQA Guidelines and the Air District’s interpretation of those guidelines. San Francisco’s greenhouse gas strategy includes a quantification of baseline levels of greenhouse gas emissions and planned reductions from the baseline 1990 level of 25 percent less emissions by 2020, 40 percent less by 2025 and 80 percent less by 2050. The Air District approved San Francisco’s greenhouse gas strategy and found that,