The dispute centers around EPA’s decision that 21 states’ plans for ozone pollution failed to meet federal Clean Air Act ...

"Here we are, weeks in, and you're still unable to proffer me any information with regard to any kind of investigation or malfeasance," U.S. District Judge Tanya Chutkan said.

The order affects workers at six federal agencies, plus workers who had already been granted relief through an earlier ruling.

The U.S. Supreme Court ruled in favor of San Francisco against the Environmental Protection Agency, backing The City's contention that provisions of a pollution-discharge permit overstepped federal ...

"If location in D.C. meant that the D.C. Circuit is a hometown court, then this court would be a hometown court for EPA, and I’ve never had that perception," joked Deputy U.S. Solicitor General ...

Mass firings and regulatory rollbacks come as scientists routinely determine pollution is far more damaging than previously ...

Announcing big changes to environmental rules doesn't undo facts on the ground overnight. Instead, EPA's announcement is the first step in what is likely to be a lengthy process to remake the rules ...

Amending federal rules and regulations is different — changes ... its critics will likely sue and the courts could rule ...