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

The first is for the California Air Resources Board's Advanced Clean Cars II regulations, which apply to light- and medium-duty vehicles like passenger cars, SUVs, and smaller trucks. The second ...

Because Trump would be unlikely to approve them, California has no choice but to abandon its groundbreaking rules for ...

Officials from the state Air Resources Board declined to comment. Under a clean air law enacted by Congress in 1967, California has the power to enforce its own tougher standards for vehicle emissions ...