I thought this was a cool bit of technology. It's a big Tower surrounded by green houses that slope upward toward the center tower. It's been tested in Spain for 8 years with a lot of variables thrown at it and produced steady power for 8 years. Now they're going to build this in Australia and possible China and Texas. http://money.cnn.com/magazines/business2/business2_archive/2006/08/01/8382232/index.htm There's a link to a better simulation on the site: http://www.solarmissiontechnologies.com/index.html I'm too jaded to believe any new technology will work half as well as they think it will, but this caught my interest.