EPA proposes weakening heavy-duty truck pollution rules
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By Camila Domonoske

Thursday, July 9, 2026 • 3:03 PM EDT

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The Trump administration is proposing changes to what it calls "unnecessary and unworkable" Biden-era environmental rules designed to cut pollution from heavy-duty vehicles, including buses and large trucks.

The proposal — part of a series of deregulatory actions by the Trump administration that have rolled back emissions standards for new vehicles — includes changes that are welcomed by trucking organizations and denounced by environmental groups.

Specifically, the proposal from the Environmental Protection Agency would scale back and postpone two provisions designed to make sure emissions-reducing technology keeps working while a vehicle is in use; one related to warranties, and another related to the useful life of emissions technology.

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