The Lumber, or Lumbee River, in eastern North Carolina ranked No. 4 on the list due to PFAS and agricultural pollution.

The effects of climate change could reduce water supply from Northern California and the Colorado River.

Botanist Naomi Fraga has been trying for years to collect seeds from the rare Death Valley sage for safekeeping in a vault of native seeds. This year, with the desert in the midst of a big bloom, she's trying again.

Surveyors say they've never seen so little snow at their annual spring measurements in the Rocky Mountains.

Volunteers in Winston-Salem, Greensboro and Ashe County are cleaning parks and public spaces this weekend as part of the nationwide Greatest American Clean-Up.

As part of their big comeback, black bears are returning to central North Carolina, where they’ve been missing for decades.

Data shows the state’s rain totals over the last six months are nearly 10 inches below normal.

There is public concern about health risks from the chemicals, especially from the Make America Healthy Again movement. The agency's move doesn't in itself guarantee regulation.

Now, the Golden State is suing to shut it back down and continue towards its switch to renewable energy.

Journalist Beth Gardiner says the fossil fuel industry is increasingly reliant upon plastic products. Her book is Plastic Inc.: The Secret History and Shocking Future of Big Oil's Biggest Bet.