Consider a graph of electricity sources[1]. About 70% of US electricity comes from fossil fuels, so statistically emissions related to cars would drop at least

Consider a graph of electricity sources[1]. About 70% of US electricity comes from fossil fuels, so statistically emissions related to cars would drop at least 30% (I don't know exactly how much cleaner coal and natural gas are compared to petroleum, but they are cleaner). One reason it would be cool to all switch to electric powered vehicles is that we'd centralize practically all consumer energy to one source (not counting the relative bit of natural gas used for home heating). This means that we'd only have to worry about energy reform of one source. [1]http://www.epa.gov/cleanenergy/energy-and-you/ http://www.epa.gov/cleanenergy/energy-and-you/