Of course to be clean, all electric cars will have to be recharged from clean electricity. But most grid power in this country comes from those bad-boy fossil fuels.
In order to remain Environmentally Correct (read: assuage guilt), those who buy plug-in cars need to pony (did I really say that?) up an additional fee.
Taking inspiration from the now-sanctified Carbon Credit, let our new fee be called the “Nuclear Headroom Credit.” The environmentally pious buyer will buy enough NucleHeads to build that fraction of Atomic generation capacity adequate to charge up his car.
Who will administer this fund?
(Ahem...) Modesty prevents me.
Actually, you can do that in some areas. Here in Knoxville, for example, you can pay an additional fee to get “green power” exclusively from non-fossil fuel sources. Of course, living in the TVA region helps a bunch, but you have to start somewhere. :p