Because Trump is unlikely to approve them, California has no choice but to abandon its groundbreaking rules for zero-emission trucks and cleaner locomotives.

Withdrawal of request for EPA waiver means the state no longer seeks to enforce its zero emission vehicle mandate on fleets.

Environmentalists prefer blaming climate change for wildfires, as the ancient Greeks blamed their gods when things went wrong. It’s passing the buck.

In order for California to promulgate vehicle emission standards without violating the Clean Air Act, it must receive a waiver from the EPA for any state law that regulates vehicles covered by the Act.

While we are disappointed that U.S. EPA was unable to act on all the requests in time," a state official said.

The California Air Resources Board (CARB) has scrapped its controversial rule that would have required the use of zero-emissions locomotives in the state

To help offset the added costs of not burning, the California Legislature appropriated $180 million to CARB for the San Joaquin Valley Air Quality Control District grant program for farmers using alternative methods, including chipping and shredding and a low-smoke burning system called an air curtain burner.

California regulators say the Trump administration is unlikely to approve the rules and that they have no choice but to abandon groundbreaking regulations for zero-emission trucks and cleaner locomotives.

Several environmental groups are suing California air regulators over their recent update of a contentious climate program, saying they failed to address the pollution impacts of biofuels.

The California Air Resource Board (CARB) has withdrawn its request to enact the proposed Advanced Clean Fleets rule.

Blue states are bracing for a battle with the Trump administration over their authority to limit tailpipe emissions, a showdown that will have major repercussions on the types of cars and trucks sold