With major proportions of the US electric grid supplied by generation sources that give various people serious heartburn (coal, nuclear)(different demographics have different heartburn over each, but there's lots of heartburn to go around), with wind of any scale running into "offended aesthetics" issues... photovoltaic still challenging to implement on a real "major grid source" level... electric cars are really interesting (and I favor innovation and diversification) but far from low impact. While the individual car no longer has a tailpipe, on a systems level, you're just "remoting" the tailpipe to a distant smokestack or a spent fuel pile (that has no final resolved destination/ fate). It also can't be ignored that each stage in electric power production, conversion, transmission, etc., adds certain unavoidable losses (the 2nd law of thermodynamics never sleeps), so that if one is going to burn natural gas or coal to spin a turbine, run through transformers and along long wires, then convert to DC to charge batteries... to run an electric motor... to turn wheels... you've stacked some multiplying losses that at least need to be looked at. I am not against production or use of electric power- it's invaluable- just noting that systems-level considerations come into effect. Again, I'm not anti-electric-car -- just very ill at ease with the impression/ illusion that they make the byproducts of energy use somehow "go away."