EPA officials ‘have ceased their efforts’ on CO2.

“Multiple senior EPA officials” have told Rep. Henry Waxman (D-CA) that since December they “have ceased their efforts” to follow the Supreme Court order to determine the hazard posed by tailpipe greenhouse emissions and to propose regulations. In December, EPA administrator Stephen L. Johnson agreed with their findings and “forwarded an endangerment finding to the White House and a proposed motor vehicle regulation to the Department of Transportation.” Since then, the officials “did not know what transpired.”

UPDATE: The Washington Post notes the EPA today “decided to lower the allowable amount of smog-forming ozone in the air to 75 parts per billion, a level significantly higher than what the agency’s scientific advisers urged for this key component of unhealthy air pollution” — at the urging of industry officials.