SDG&E energy mix 2009 and 2015 forecast
 
      
      SDG&E has invested $485 million in energy efficiency programs, saving over 2.9 million megawatt hours of electricity over the last 15 years
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                        http://www.ci.chula-vista.ca.us/clean/conservation/climate/documents/SDGEEnergySupplyandDistributionOverview.pdf