Electrical device plugs directly into trees for power

In the Green Room: Chuck's biodiesel explainer, part one

The Flying Dutchman: Teen flies homemade pedal-powered plane

Can space travel save the planet?

Now it's even easier to offset the CO2 from that private jet

Why Cash for Clunkers was like a methadone clinic

Swanky space hotel concept provides a full futuristic experience

High-tech workshop uses gaming and tracking software to make drivers greener

Eco-minded renters get housing-search help

Indian doctor saves water - and lives - with eco-friendly toilets

Bicycle parking would entice more people to ditch their cars

The Chevy Volt: 230 miles per gallon! What’s wrong with this picture?