A new study finds that the Canadian tar sands are a major source of secondary organic aerosols.
New research shows acidification caused by carbon dioxide kills and stunts baby Dungeness crabs.
The U.S. led the world in oil production last year for third year in a row, ahead of Saudi Arabia and Russia.
A slowdown in Atlantic currents that worsened blizzards, floods and hurricanes may have been natural.
April 2016 was the hottest April on record globally.
Temperatures we think of as normal are getting warmer.
With the streak of record-warm months continuing, 2016 is looking likely to become the hottest year on record.
Falling carbon emissions from the electric power sector could help states meet their climate goals.
Marshes are used to reduce flooding, and new research shows how they could flourish as seas rise.
Carbon dioxide levels are nearing their annual peak, and they may not dip below 400 ppm again.
Forests that regrow after being cut play an unexpectedly valuable role in sequestering carbon emissions.
Fossil fuels will still be the dominate energy source on the planet in 2040, a U.S. government forecast shows.
Two researchers say taking smaller steps could be the best way to achieve international climate cooperation.
A new graphic shows Earth's temperatures spiraling toward the 2°C global warming limit.
No carbon emissions targets have been set for international shipping... yet.
A U.N. panel said that governments should study the worst-case global warming scenarios.
More natural gas is coming from fracking than ever before, and much of it is being used for electricity.
Warm weather out West has pushed the Lower 48 to its second warmest January through April on record.
Our report examined intensity and duration of the heaviest runoff events for each state.
A large majority of states will face an increased threat of inland flooding by mid-century.