they have an engine(again european)that can use water to power the car, it still requires the use of a gasoline, but the vehicle doesn't use as much.

http://www.waterpoweredcar.com/nz.html

http://www.popsci.com/popsci/automotivetech/index.html

popular science spends a lot of time discussing alternative fuels, not suprising, most of the tech is out of europe.