Earth Institute's Steven Cohen breaks it down

Saltmarshes of Guerande photographed by Paul Morin

Farmers bring the sustainable food movement to Wall Street

The liberals' favorite conservative reverses stance on global warming, saying the science is "not enough" for U.S. action

Legislative delay means there's time for revisions

'Data furnaces' tap heat-generating computer servers to warm houses

A spicy and sweet Indian delight that works in lots of meals

A fashion photographer heads back to his roots

Want to improve the health of people your 'hood? Just clean and green the vacant lots, says new study

Top nature shots from Nat Geo's 2011 photo contest