More than 40 countries now have a cap-and-trade system or carbon tax, or will soon -- and China, Brazil, and other emerging economies might soon join the club.
The U.S. still doesn't have a single offshore wind turbine. The Interior Department is trying to change that by auctioning wind leases off the coasts of Rhode Island and Massachusetts.
Fishermen and native groups want EPA to block the proposed Pebble Mine near Bristol Bay, one of the world's most productive salmon fisheries and home to vast reserves of gold and copper.
After a tornado outbreak, NOAA dropped its plan to force employees to take unpaid days off to deal with the sequester. But budget cuts will still have to come from somewhere.
Officials say the ban has spared the country 67 billion polluting plastic bags, though a study finds that many retailers are still ignoring the rules.
Rising temperatures off the East Coast are driving away herring, which is making it hard for puffins to find food for their young.
A recent study found that vegetarians were 12 percent less likely to die over a six-year period than were meat eaters. Men in particular got a health boost from skipping meat.
The Connecticut legislature has passed a law requiring labels on genetically modified foods, but it won't go into effect until at least four other states follow suit.
After a rogue strain of GMO wheat popped up in Oregon recently, we heard that Monsanto had stopped testing such wheat in 2005. Turns out that's not quite true.