A F350 running Biodiesel is at least as clean as a Prius. If you look a the smaller cars running diesel engines (Volkswagen Jetta) that get twice the mileage of a F350, with alternative fuels you can have inexpensive, long lasting cars that are very clean.

I like this idea, but I'd rather see b100 pumps being put in so that I could just 'pay at the pump'.