Senate Majority Leader John Thune and several other top GOP senators Tuesday pledged to vote to nix California's Clean Air Act emissions waiver.

The Republican-majority Senate voted to nullify California's landmark environmental rule that would've banned the sale of new ...

WASHINGTON (AP) — Senate Republicans on Wednesday voted ... “go far beyond the scope Congress contemplated in the Clean Air Act” and said they “endanger consumers, our economy and our ...

After throwing out the latest auto emissions rules that California set, Wyoming’s congressional delegation and fellow ...

the Senate invoked the Congressional Review Act to overturn the state's Clean Air Act waiver in a 51-44 vote and send it to Trump's desk. Republicans, who had to execute a complex parliamentary ...

If enacted, Republicans’ draft legislation would mean that President Biden’s signature climate legislation would effectively ...

Reversing California’s emissions power grab is essential to RV, automotive and engine manufacturing industries in the state ...

Trump signed measures on Thursday revoking waivers for the state’s mandates that clean up car and truck exhaust and ramp up ...

Montana passed the state Clean Indoor Air Act, which said indoor public places and workplaces must be smoke-free.

North Carolina legislators have finalized a bill that would eliminate an interim greenhouse gas reduction mandate set in a ...