Oil & Gas

Exxon knew climate risks in 1981, email suggests

15 indelible images from the Refugio oil spill

Could the carbon bubble ruin your retirement?

50 whales may be a new (and very endangered) species

5 years after BP oil spill, brown pelicans still affected

Exploration of Siberia's mystery craters urged by researchers

Are abandoned oil and gas wells dumping methane into the atmosphere?

4 reasons why Alaska's Bristol Bay is worth protecting

Leonardo DiCaprio visits Alberta tar sands for new documentary

Rafting through ANWR, to protect the 'Last Great Wilderness'

Giant hole mysteriously forms in Siberia, and nobody knows why

If you like gorillas, you should probably see 'Virunga'