Pennsylvania is the nation's fourth-highest source of greenhouse gas emissions, which had been regulated by the EPA as a ...

'They want to make pollution great again,' Gov. Gavin Newsom said in criticizing the climate protection rollback.

California, Massachusetts, Connecticut and New York are leading a group of 20 other states in suing the US Environmental ...

The EPA contends President Obama didn't have the authority to issue the finding, and bypassed the legislative branch in a ...

Leaders in two dozen states, including New Mexico Attorney General Raúl Torrez, on Thursday sued the U.S. Environmental ...

The lawsuit seeks to overturn the Trump administration's reversal last month of the 2009 ruling that underpins all US ...

The suit accuses the agency of illegally repealing the endangerment finding, the scientific assessment that required it to regulate greenhouse gases.

EPA's repeal of the 2009 endangerment finding in February eliminated the foundation of much of U.S. climate policy.

States and cities have sued the EPA to restore a critical climate protection, claiming the agency is jeopardizing the health ...

A new lawsuit by 23 states and D.C. is challenging the EPA's move to rescind the legal foundation for regulations limiting greenhouse gas emissions.

Minnesota and nearly two dozen other states sued the EPA Thursday, challenging the repeal of a 2009 finding that carbon dioxide and other greenhouse gases threaten public health.