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

The Trump administration announced on March 12, that it is “reconsidering” more than 30 air pollution regulations in a series of moves that could affect air quality across the United States.

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

The Trump administration vowed to rid the EPA of a backlog of decisions on state plans to manage air pollution. Now advocates ...

The Supreme Court appears poised to keep at least some Clean Air Act disputes in federal courts outside of D.C. — preventing what at least one justice described as “home court advantage” for the ...

The EPA's decision on the Valley's ozone nonattainment issue could have big impacts on public health and the local economy.

Oregon is at a critical crossroads when it comes to clean transportation. Recently, diesel truck manufacturers and fossil fuel companies have led efforts to slow Oregon's progress toward reducing ...