This was three years ago in Japan: Car that runs on water

[bobito]

This development saw the success completion a car that runs on water. You don't have worry about the kind of water to use since any water be it river, rain, sea water could do.

The technology and innovation was applied in extracting hydrogen from water and using the electrons to produce electrical energy. Take a look.

http://www.youtube.com/v/LzGU_8uvsZ0

From the simple ideas we play with, is a huge project just with proper and smart work put.