Colorado is now in severe violation of two federal ozone pollution standards, and it must find a way to reduce that pollution ...

The party-line vote marked the first time in the 55-year history of the Clean Air Act that Congress has moved to weaken the ...

If also passed by the House as expected, the action will be the first time Congress has weakened protections under the Clean Air Act.

EPA is getting rid of the two offices that are primarily responsible for regulating climate and air pollution.

Lawmakers voted to stop the state from requiring that an increasing share of new trucks sold there have zero emissions.

Critics say the joint efforts are not a coincidence as the restructured agency air program moves to weaken pollution ...

House moves to repeal the Golden State’s authority to set higher car and truck emission standards, which have long been ...

The facility’s emissions practices released hazardous pollutants into the air across from a residential neighborhood.

The U.S. EPA said it will fine a Burns Harbor steel mill slag processor $190,000 in a settlement for federal Clean Air Act violations.

Gov. Gavin Newsom issued a statement in response to the House vote that targeted California’s clean vehicles program, stating that the Republican-controlled House illegally used the ...