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HARBOR BLVD. MIXED USE TRANSIT CORRIDOR PLAN FINAL FIR <br />CITY OF SANTA ANA <br />5. Environmental Analysis <br />GREENHOUSE GAS EMISSIONS <br />Table 5.5 -2 Summary of Global Climate Change Risks to California <br />Impact Category <br />Potential Risk <br />Public Health Impacts <br />Poor air quality made worse <br />• <br />More severe heat <br />Water Resources Impacts <br />Decreasing Sierra Nevada snow pack <br />• <br />Challenges in securing adequate water supply <br />• <br />Potential reduction in hydropower <br />• <br />Loss of winter recreation <br />Agricultural Impacts <br />Increasing temperature <br />• <br />Increasing threats from pests and pathogens <br />• <br />Expanded ranges of agricultural weeds <br />• <br />Declining productivity <br />• <br />Irregular blooms and harvests <br />Coastal Sea Level Impacts <br />Accelerated sea level rise <br />• <br />Increasing coastal floods <br />• <br />Shrinking beaches <br />• <br />Worsened impacts on infrastructure <br />Forest and Biological Resource Impacts <br />Increasing risk and severity of wildfires <br />• <br />Lengthening ofthe wildfire season <br />• <br />Movement of forest areas <br />• <br />Conversion of forest to grassland <br />• <br />Increasing threats from pest and pathogens <br />• <br />Declining forest productivity <br />• <br />Shifting vegetation and species distribution <br />• <br />Altered timing of migration and mating habits <br />• <br />Loss of sensitive or slow- moving species <br />Electricity <br />Potential reduction in hydropower <br />• <br />Increased energy demand <br />Sources: CEC 2006a; CEC 2008. <br />Regulatory Setting <br />Regulation of GHG Emissions on a National Level <br />The United States Environmental Protection Agency (EPA) announced on December 7, 2009, that GHG <br />emissions threaten the public health and welfare of the American people and that GHG emissions from on- <br />road vehicles contribute to that threat. The EPNs final findings respond to the 2007 U.S. Supreme Court <br />decision that GHG emissions fit within the Clean Air Act definition of air pollutants. The findings do not in <br />and of themselves impose any emission reduction requirements, but allow the EPA to finalize the GHG <br />standards proposed m 2009 for new light duty vehicles as part of the joint rulemaking with the Department <br />of Transportation (EPA 2009). <br />The EPNs endangerment finding covers emissions of six key GHGs ---- CO2, C114, N20, hydrofluorocarbons, <br />perfluorocarbons, and SFb which have been the subject of scrutiny and intense analysis for decades by <br />scientists in the United States and around the world (the fast three are applicable to the proposed project). <br />October 2014 Page 5.5 S <br />