Solar
"We are like tenant farmers chopping down the fence around our house for fuel when we should be using nature's inexhaustible sources of energy - sun, wind and tide. ... I'd put my money on the sun and solar energy. What a source of power! I hope we don't have to wait until oil and coal run out before we tackle that." -- Thomas Edison to Henry Ford and Harvey Firestone (1931)
Hydrogen
Hydrogen Powered Autos and the Hydrogen Economy:
Hydrogen Economy
Hydrogen Powered Autos
Ford HySeries Edge
Wind
more on wind at Pickensplan.com
Renewable Transportation
Ocean Electric Power
Tidal Power in New York's East River
UK Harnesses Tidal Power