snowpack for water supply and rising sea levels threatening coastal real estate and habitat. Governor Arnold Schwarzenegger also signed Executive Order S-21-09 in September 2009 requiring 33% of electricity sold in the California come from renewable resources by 2020 to curb greenhouse gas emissions. This assembly of legislation and evidence of environmental impact led to California enacting requirements for lead agencies to consider greenhouse gas emissions in their CEQA reviews. California Office of Attorney General sent several comment letters to lead agencies urging them to consider greenhouse gas emissions during their CEQA review. Senate Bill 97 required the Governors Office of Planning and Research to develop and recommend new guidelines to analyze greenhouse gas impacts under CEQA. California's Natural Resources Agency adopted new guidelines on December 31, 2009, requiring lead agencies to analyze greenhouse gas emissions under section 15064.4 during their CEQA review through California. The major category of greenhouse gas emissions resulting from human activities is carbon dioxide. Several other primary gases also include methane, nitrous oxide, sulfur hexafluoride, perfluorocarbons, and hydrofluorocarbons. Greenhouse gas sources resulting from project construction activities are typically generated from transportation of materials to the project site and petrol based equipment used during construction of the project itself. Stationary sources emit greenhouse gases from a single point source such as a smoke stack. Stationary source examples include coal- or gas-fired power plants, incinerators, refineries, bakeries, or chemical plants. Projects that are not stationary sources such as residential and commercial developments, schools, and related infrastructure can also contribute to increases in greenhouse gases. These projects emit greenhouse gases from sources such as vehicle mileage trips to site, energy to run the facility, and landscape maintenance equipment. Land use conversion can reduce vegetation sequestration of carbon dioxide. The State Air Resources Board or California Air Resources Board is the state agency charged with monitoring and regulating sources of greenhouse gas emissions under AB32. California's thirty-five local air pollution control districts (APCD's) and air quality management districts (AQMD's) are the agencies primarily responsible for regulating stationary sources of air pollution. These air districts traditionally provide guidance to lead agencies, such as counties, cities and public utilities, on the evaluation of air pollutants under CEQA. Analysis approach The lead agency is the public agency which has the principal responsibility for approving a proposed project. The lead agency determines which type of environmental document will be prepared (Mitigated Negative Declaration,