http://content.sierraclub.org/evguide/myths-vs-reality
Edit: with citations...
Well that deals with the CO2 and confirms small electric card are more efficient than Big Gas SUV's.
...* citation: http://www.worldcoal.org/coal/uses-of-coal/coal-electricity/
pollution from coal
citation: http://en.wikipedia.org/wiki/Environmental_impact_of_the_coal_industry (Sterilised by Wikipedia PR firm.)