Climate groups sue Trump administration over EPA's bombshell deregulation decision

Climate activist groups sued President Donald Trump's administration on Wednesday in an effort to block officials from undercutting environmental regulations.

The lawsuit targets the Environmental Protection Agency's decision to revoke an Obama-era "endangerment finding" that serves as the underpinning for sweeping climate regulations. The finding, which the administration announced plans to revoke last week, asserted that pollution and climate change constitute harm to the American people.