EcoModo - The Best of Treehugger

This week at TreeHugger: Sunrgi Xtreme Concentrated Photovoltaics: Concentrating solar up to 2,000 times to make it cost-competitive with fossil fuels. Ok, this is silly, but this guy put a lot of effort into re-inventing the horse carriage, and his "one horsepower" Naturemobil is kind of cool. The world's largest LED display is going solar. And last but not least, Help Protect Great Tits, Fight Global Warming, Scientists Say (With Pictures).

Sunrgi's Xtreme Concentrated Photovoltaics (XCPV) are claimed to be able to produce electricity at 5 cents per kWh by concentrating the Sun's light close to 2,000 times (!) into extremely efficient solar photovoltaic cells. Part of Sunrgi's patent-pending technology has to do with the cooling of the solar cells, dual-axis sun tracking, and the way the whole system is optimized for mass-production.

It's a crass commercial DIY project - the guy wanted to attract lots of attention to put ads on the sides of his carriage - but it turned out kind of interesting. Instead of having the horse pull the carriage, the horse is in the back, walking on a conveyor belt.

Visitors to the Olympics in Beijing this summer can look forward to more than just history's largest sporting event and biggest national coming-out party. They'll also be able to glimpse the world's largest color LED display combined with China's first photovoltaic system to be integrated into a glass curtain wall.

And of course, Help Protect Great Tits, Fight Global Warming, Scientists Say.

TreeHugger's EcoModo column appears every Tuesday on Gizmodo.