The U.S. Dept. of Transportation’s Federal Highway Administration released a final rule April 18 rescinding requirements that states track tailpipe emissions of greenhouse gases and set goals to ...

SACRAMENTO, Calif. -- The Republican-controlled U.S. House voted Thursday to block California from enforcing ...

U.S. Supreme Court justices appeared sympathetic on Wednesday to a bid by fuel producers to challenge California's standards ...

The original rule, which had been tied ... declining targets for carbon dioxide emissions and require states to measure and report the changes in tailpipe emissions. The Trump administration ...

(AP) — The Republican-controlled U.S. House voted Thursday to block California from enforcing first-in-the-nation rules phasing ... standards to cut tailpipe emissions from medium- and heavy ...