26-hour flight confirms viability of emissions-free air travel.

A U.S. military base goes solar.

New nanotechnology research means your pants may one day power your iPod.

Zero emissions? That depends on where you get the electricity to charge your car.

A Polish architecture firm's visionary concept for a net-zero skyscraper.

Biannual Environmental Performance Index unveiled at the World Economic Forum.

Score one for the environment.