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 ...

The Department of Justice wants the courts to block New York's Climate Change Superfund Act, which charges oil and gas ...

S.J. Res 31, from Sen. John Curtis (R-Utah), would repeal Clean Air Act regulations issued last September as a replacement ...

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

The safeguards closed a loophole by requiring all “major” sources of seven hazardous air pollutants to maximize their emissions reductions.

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

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

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

This week, the House of Representatives voted to block the state’s ban on the sale of new gas-powered vehicles, challenging ...

American Lung Association report found that about 156 million people live in counties plagued by high levels of ozone and ...

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