The president has mocked global warming as a “hoax,” but his administration avoided testing that claim in court as it targeted the endangerment finding.

The Trump administration on Thursday revoked a scientific finding that long has been the central basis for U.S. action to regulate greenhouse gas emissions and fight climate change, the most aggressiv...

The action “will be the largest deregulatory action in American history, and it will save the American people $1.3 trillion in crushing regulations,” she said.