Critical List: Exxon could lose a big Gulf oil lease; alligator fat makes good biofuel
Exxon could lose its lease on one of its biggest oil finds ever.
Bill McKibben explains why Keystone XL protesters will wear Obama '08 buttons.
Oil and gas companies are looking for a bounty in Greenland.
Fifteen million pounds of leftover fat from alligator meat gets thrown away each year (really! People apparently eat that many alligators!), but it could be processed into biofuels.