We had some really great threads last year, with the following four nominated for the Thread of the Year award in this January's Environment Site Awards ceremony.
Solar Energy ForumI have no doubt that we will be successful in harnessing the sun's energy.... If sunbeams were weapons of war, we would have had solar energy centuries ago. ~Sir George Porter
Man plans to drive around the world in a solar car
Driving around the world he will educate people about global warming. He's already taken it for a 1,865-mile test run from Lucerne Switzerland to Barcelona Spain with no problems. The car looks like something out of Blade Runner and "The interior will feature leather seats and an MP3 sound system."