Under the Clean Air Act, sources frequently must undergo “New Source Review” (NSR) permitting, which is a pre-construction permitting program.

The country’s only fully operational lithium mine had an air pollution problem, Nevada regulators found. Until the state ...

Elon Musk’s AI startup xAI has installed 35 gas turbines to run its Memphis data center, though it only applied for permits ...

The decision bought officials time to avert economic harm, but raised concern from health advocates about the continued impacts of ozone on Arizonans.