An EPA ruling says Colorado can't require coal plant closures by a certain date, and some utilities may take advantage.

Colstrip Unit 4 has the highest emission rate for toxic emissions compared to any other coal unit in the country.

A coalition of U.S. cities, led by Baltimore, Chicago, and Columbus, has filed a lawsuit against the Trump administration, ...

Taconite plants on Minnesota’s Iron Range will now get two extra years to comply with a rule that would have forced them to cut how much mercury they release into the air. A proclamation signed by ...

Laura Loomer says she doesn’t want to be the center of the story. But despite her protestations, she is.