What sorts of idiots think that plug-in cars are any less CO2-producing than gas cars? (No, I am not calling Insty an idiot.) Where do they think electricity comes from? Unless you have tons of nuke power, of course. No evil, evil CO2 from nukes.
nb: I think this is all a tempest in a teapot anyway, and doesn't matter one bit. In a year or two, we'll all be laughing about the AGW scams and frenzies.