Ethereal travel photos of southern Africa

Yes, but maybe not as much as you think

Longtime environmentalist Yann Arthus-Bertrand snaps the Earth from above

Dems block measure to to speed up oil leases off the U.S. coast

Home improvement giant buys stake in rooftop solar start-up

Landmark ICPCC report says supply of renewable power can meet global demand

Green ideas permeate elegant, modernist Desert House

Signals from mobile phones may be partly to blame for mysterious decline of bee populations around the world