If nothing else, it's a sign he's taking environmental concerns seriously.
Our political system is in love with fossil fuels, costs be damned
How an insecure, acid-dropping hippie kid reinvented himself as a technological visionary - and changed the world
Tim DeChristopher on life behind bars - and what environmentalists can learn from OWS
How the Apple co-founder changed the computer industry and then went after the music business
Time to reconsider a once-fringe climate solution?
The Pentagon's top weaponeer says he has a radical solution that would stop global warming now.
Want to know what global warming has in store for us? Just go to Australia, where rivers are drying up, reefs are dying, and fires and floods are ravaging...
Why the industry as we know it is a dead man walking
How the president can help slow the rise of the oceans and heal the planet - without waiting for Congress
Jeff Goodell on why the Texas governor makes George W. Bush look like a tree hugger.