The Paris climate deal says it will be up to each individual nation to decide how its armed forces will comply with environmental regulations.
How rising temperatures are changing the world, in charts
Among them: postcard-perfect lighthouses, parks, and seaside city blocks
Updates from our Climate Desk team
New research takes the deepest dive ever into historic climate records.
"The prospects of keeping climate change below that [two-degree goal] are fading away," says Pieter Tans, leader of NOAA's greenhouse-gas measurement team.
Damn the deniers, the doubters, and the do-nothing Congress. The Pentagon is moving full green ahead.
Navigation has become treacherous as the worst U.S. drought in half a century brings water levels close to record lows.
And what it teaches us about future climate catastrophes.
Inside the darkened stairwells of high-rise apartments on Manhattan's Lower East Side, residents battle power outages, and each other.
"I think we all can agree we're seeing complete and utter devastation."
Lately public opinion has shifted back towards belief in the reality of climate change that is caused by humans.
Warming could be a winning issue, but President Obama isn't pushing on it -- and experts finger one of his top aides as the culprit.
For years, he's been arguing that talking about the science of warming is a winning political strategy. Now, new polling data are backing him up.
Surprising new polling data shows swing voters are going green.
A chemical analysis reveals that the iPhone 5 is among the less toxic phones on the market.
Photographer James Balog has captured what's at stake in some of the world's most extreme places.
Palau tries a novel legal strategy.
Curiosity will hunt for signs of Martian climate change, which can help shed light on Earth's own.
Weak or non-existent disclosure laws mean that people may not know about the natural-gas wells near their houses and schools.