I don't know the stats but the whole "electric car" thing gives me the same feeling I get when I see the commercials for GM "green" corn powered ethanol vehicles. The amount of oil and environmental (not to mention economic) destruction that goes into growing corn already is just astounding... why do we need to make a fleet of vehicles that demands more of it, merely offsetting the source of the oil based pollution to something else, namely production of "green" fuel? What would we do if electric cars became a fast success... in CA we have power shortages as it is! I can't imagine if there were tens of thousands of cars plugged in. Are hydrogen fuel cell cars the answer? Or does production of hydrogen produce pollution as well?

edit:

I read this article a few days ago. It's sort of rambling but has lots of interesting conjectures. It talks about net energy, agriculture's role in sopping up oil energy, and the waste associated with processing foods in ways most of us don't consider.

Seriously... this article is LONG, but you REALLY should read it.

The Oil We Eat:
http://www.harpers.org/TheOilWeEat.html