Nuclear power (fission) pollutes because producing fission reactor fuel produces enormous quantities of CO2.
While producing a pound of uranium isn't a clean process by default, I'll admit, isn't the CO2 insignficant once you figure the amount of power you're going to produce from said fuel?
It would help if we had breeder reactors, recycled waste, or had more reactors that take unenriched uranium
By the same token Wind isn't CO2 free either - you have the CO2 from producing the concrete pad to put the tower in, the CO2 from producing the tower, construction vehicles and all that.
Energy Balances and CO2 Implications - Scroll down to see the table of CO2 outputs by power type.
I'll also note that we can, if we so choose, drop that even more for nuclear power. For example, suppose that rather than using coal power for various refining tasks we went ahead and used nuclear power instead?
As for the car, it's neat, but my concern is cost - are the fuel cells approaching anything near 'affordable'? Last I'd heard, NG fuel cells weren't quite as efficient, but the energy gain from going to CNG as you don't need the reformer and storage is much simpler outweighed the loss of efficiency. Of course, in this case the waste heat is being put to good use.
Then again, I could put the CNG directly into a car, and especially during the summertime use the sun to heat my water.
edit - lost part of a sentence in there ?: