A monitor in Hawaii registered 400 parts per million of carbon dioxide in Earth's atmosphere. Here's what that means.
The last 10 years have seen unprecedented ice loss. Don't expect that speedup to continue, a new study says.
A new federal study doubles previous estimates of the Bakken Shale’s oil reserves.
Want to sell a Republican a greener lightbulb? Don't tell them it's green.
Fossil fuel cheerleaders take note: Clean energy ain't going nowhere -- and it may prove to be the better bet in the long run.
… but misses the big picture of the agency's transparency problems.
Even without an overall climate strategy, the country is inching ahead on climate action, a new report found.
GOP lawmakers are pushing bills to limit the amount of biofuels in the nation's energy supply and axe requirements that gasoline producers use ethanol.
Methane leaks are "super low-hanging fruit": Fixing them may be the single biggest step the U.S. could take toward meeting its emissions-reduction goals.