To delist or not to delist? When it comes to grizzly bears' "threatened" designation, it's not clear they are out of the woods, as the woods itself is threatened by climate change.
Why we pretend the next storm won't happen -- and flush billions in disaster relief down the drain.
After Obama's climate pledge, is the Export-Import Bank finally changing its stance on fossil fuel projects?
Large power plants are stuck in a terrible cycle.
A new study in Science links tremors near Midwest injection sites with huge quakes thousands of miles away.
Barry Goldwater Jr. is putting the family name behind an effort to protect solar energy's growing share of the electricity market.
The good bits from Obama's climate speech and plan, from denier bashing to renewable energy goals.
A landmark study finds climate change could have a huge impact on the National Flood Insurance Program.
The natural gas boom has big green groups wrestling with whether to support regulated gas extraction as a cleaner alternative to coal.