A bill in the Montana Legislature that would limit state officials' ability to regulate air quality standards has advanced to ...

The Colstrip plant, located in eastern Montana, has the highest emission rate of fine particulate matter out of any ...

Of the two bills, one targets outdoor air quality, the other looks to tackle indoor air pollution.

The Trump administration’s attempt to roll back numerous vehicle pollution standards has left states wondering what’s next.

Moms React to EPA Director Boasting of Closing Museum, "Take This Show on the Road!"President Trump's Administrator of the Environmental Protection Agency (EPA), Lee Zeldin, is promoting a video ...