Gas Prices? What Alternatives?

Just saw a special on PBS' NOVA Car of the Future. This is just a teaser ad for NOVA, but you'll get the idea. Does America have alternatives? Sun and wind can power our homes and businesses, but cars? Driving through Kansas, there are many windmills being installed to farm the wind energy. So much talk is about cars, what about trucking? Would Colani's truck designs be an option? I have heard up to 70% more efficient than current day?