This Republican presidential contender gets a lot of credit for his views on the climate, but his record on the issue has been mixed.
A new ranking of U.S. senators based on their climate activism puts presidential candidate Bernie Sanders among the top "climate hawks."
Here's why he's wrong.
The group intends to show that climate-denying Republican candidates are under the thumbs of major donors like the Koch Brothers.
The Senate's most vocal critic of the scientific consensus on climate change used the snowball as part of his case for why global warming is a hoax.
A group of Senate Democrats from the Northeast is pushing back on the Obama administration's proposal to open new areas of the Atlantic Ocean to oil and gas drilling.
The newly weakened Senate Democratic caucus is trying to muster all the opposition it can to the impending vote on the Keystone XL pipeline.
Most coastal regions of the United States will see 30 or more days of flooding by 2050 thanks to sea-level rise, according to new research from NOAA.
Disappearing beaches, erosion, and buildings toppling into the sea are just a few problems citizens of Shishmaref, Alaska, are dealing with due to climate change.