6 Solar technologies to power the world

At last, solar energy is big enough and cheap enough to power electrical grids. Business 2.0 features the latest projects under the sun.

Solar trees
The Stirling dish is a 30-year-old technology that's just now becoming cost-effective thanks to big solar-power orders from utilities. In time, 70,000 of these "solar trees" planted in the Mojave Desert by Stirling Energy Systems of Phoenix could power a million homes.






Green Wombat Find bonus material on the technology and companies behind Big Solar on Todd Woody's blog. (more)
Big Solar's day in the sun The economics -- and the technology -- of turning light into electricity have changed. We have the inside look at the industrial-strength power plants coming soon to a grid near you. (more)
Go green, get rich Meet the companies tackling nine of humanity's biggest problems -- and making millions saving us from ourselves. (more)