The US DOE provides a nice interactive tool for comparing emissions between electric and gas-powered vehicles. The DOE data show that, in all US states, an elec

The US DOE provides a nice interactive tool for comparing emissions between electric and gas-powered vehicles. The DOE data show that, in all US states, an electric car has lower CO2 emissions compared to a gas-powered car with average US MPG. You can enter your zip code and it will graph the CO2 equivalent: http://www.afdc.energy.gov/vehicles/electric_emissions.php http://www.afdc.energy.gov/vehicles/electric_emissions.php Gas powered cars with average US MPG produce 14815 pounds of CO2 equivalent per year. Ohio produces 70% of its power from coal. Entering 44101 for Cleveland, you get 9074 pounds of CO2 equivalent per year, 39% less than gas-powered car. Entering 94103 you can see that electric cars in San Francisco produce 4152 pounds of CO2 equivalent, 72% less than a gas-powered car. A big part of the determination of CO2 emissions is the MPG of gas powered vehicles. In a few states, a hybrid electric has lower emissions than an all electric car because hybrids have a much higher MPG. This is explained nicely here: http://shrinkthatfootprint.com/electric-car-emissions http://shrinkthatfootprint.com/electric-car-emissions The average fuel consumption for gas-powered vehicles in the US is around 24 MPG: http://www.rita.dot.gov/bts/sites/rita.dot.gov.bts/files/publications/national_transportation_statistics/html/table_04_23.html http://www.rita.dot.gov/bts/sites/rita.dot.gov.bts/files/pub...