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

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.

California for decades has driven the U.S. toward less-polluting vehicles. It is the only U.S. state with the power to request a waiver from the EPA to set its own, more stringent

In a striking setback to reduce California’s air pollution but a win for trucking companies, state regulators have walked away from their ambitious plan to phase out diesel trucks less than a week before President-elect Donald Trump returns to the White House.