E.P.A. Moves to Loosen Limits on Pollution From Trucks NYT - Energy & Environment By: Maxine Joselow 9 July 2026 at 20:20 The Trump administration wants to roll back some Biden-era restrictions on smog-causing emissions from heavy-duty vehicles. Β© Justin Sullivan/Getty ImagesTrucks at the Port of Oakland. The new proposal would rescind a 2022 rule designed to significantly reduce emissions of nitrogen oxides, which cause smog.