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FjMOUNTAIN HOUSE NEIGHBORHOODS K AND L INITIAL STUDY 5.ENVIRONMENTAL CHECKLIST j3.AIR QUALITY AND GREENHOUSE GAS EMISSIONS F! t earth that can be measured by wind patterns,storms, precipitation, and temperature. I GHGs include all of the following naturally occurring and anthropogenic(human- made) gases: carbon dioxide (CO2), methane, nitrous oxide (N20), sulfur hexafluoride, perfluorocarbons, hydrofluorocarbons,and nitrogen trifluoride(NF3) Eli (California Health and Safety Code Section 385O5[g]). CO2 is the reference gas for climate change.To account for the warming potential of GHGs, and to combine emissions of gases with differing properties, GHG emissions are Fj typically quantified and reported as CO2 equivalents(CO2e). Potential global warming impacts in California could include loss in snow pack, � g 9 p p , sea level rise, more extreme heat days per year, more high ozone days, more large forest fires, and more drought years. Secondary effects are likely to include a global rise in sea level, impacts on agriculture,changes in disease vectors, and F1changes in habitat and biodiversity. State Regulations (' AB 9493 and Amended°Aavley,'Regulations On July 1, 2002, the California Assembly passed Bill 1493(AB 1493)(signed into C law on July 22, 2002), requiring CARB to"adopt regulations that achieve the maximum feasible and cost-effective reduction of GHG emissions from motor F.' vehicles."The regulations were to be adopted by January 1, 2005, and to apply to 2009 and later model-year vehicles. In September 2004, CARB responded by adopting"CO2-equivalent fleet average emission"standards.The standards will Fi be phased in from 2009 to 2016, reducing emissions by 22 percent in the"near term"(2009-2012)and 30 percent in the"mid term"(2013-2016), as compared to 2002 fleets. Fil Executive Order S-3-05 On June 1,2005, Governor Arnold Schwarzenegger signed Executive Order (EO) S-3-05, establishing statewide GHG emission reduction targets. This EO provides that, by 2010, emissions must be reduced to 2000 levels; by 2020, emissions must be reduced to 1990 levels; and by 2050, emissions must be t reduced to 80 percent below 1990 levels.The Secretary of the California Environmental Protection Agency(Cal EPA) is charged with coordinating oversight of efforts to meet these targets and formed the Climate Action Team (CAT)to carry out the E0.Several of the programs developed by the CAT to meet the emission targets are relevant to residential construction and include prohibition of idling of certain classes of construction vehicles, provision of recycling facilities within residential buildings and communities, compliance with California Energy Commission (CEC)building and appliance energy efficiency standards, compliance with California's green buildings and solar initiatives, and implementation of water-saving technologies and features. (WM1) 5-29