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 ...

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

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

Gov. Gavin Newsom issued a statement in response to the House vote that targeted California's clean vehicles program, stating ...

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

California Governor Newsom rebukes House Republicans' move to challenge the state's vehicle emissions standards.

Republicans say the U.S. Environmental Protection Agency was wrong to reinstate the state's air pollution lawsuit policy ...

Weakening or rolling back longstanding environmental regulations would worsen the problem, the American Lung Association ...

The votes called into question California’s waiver from the Clean Air Act of 1970, an authority that has allowed the state to set stricter pollution guidelines. Republicans in the House ...

The number steadily dropped for over a decade as Clean Air Act protections kicked in. Then, the trend stalled. “In many places we started to see ozone and particle pollution trends reverse ...

The House on Wednesday voted to axe California’s clean truck rules — defying Congress’s own internal watchdog in doing so.

When it comes to regulating motor vehicle emissions, California has long been different. California was the first state in the nation to ...