Also, power plants are more efficient at extracting energy from their fuel than cars are at extracting energy from theirs. (Of course, you may lose a lot of that efficiency once an electric car gets to use the electricity.) Also, while alternatively-powered power plants (hydroelectric, wind farms, etc.) may account for a minuscule portion of the country's power production, it's still an infinitely bigger portion than that used by a car. And, regardless of their other noxious outputs, nuclear power plants do not produce air pollution.