California’s Landmark Truck Emissions Rules Get Federal Approval

The Environmental Protection Agency issued two Clean Air Act waivers to California on Friday, formally approving the state’s more stringent heavy-duty truck emissions rules.

The agency action paves the way for implementation of the California Air Resources Board’s Advanced Clean Trucks rule, which aims to accelerate the shift to zero-emission heavy-duty trucks. A second waiver grants approval for actions that extend emissions warranties for certain on-road trucks.

“This is a big deal for climate action. Last year, California became one of the first jurisdictions in the world with a real plan to end tailpipe emissions for cars,” California Gov. Gavin ...