Saturday night - March 28, 2009 at 8:30 PM EST is the start of EARTH HOUR.

LINKS TO: Solar Wind Hydro-Electric Experimental Power Overview: All forms of power generation rely on 2 basic principles.

1. A source that can produce work (The Sun, wind, water, or a gasoline engine)
2. The medium to generate elecricity. (The physical generator, alternator, or in the case of Solar power which is a direct conversion.