California adopts strong new regulation to further reduce smog-forming pollution from heavy-duty diesel trucks

California Adopts Strong New Regulation to Further Reduce Smog-Forming Pollution from Heavy-Duty Diesel Trucks

August 28, 2020 —

The California Air Resources Board late yesterday approved a multi-pronged regulation that will dramatically reduce smog-forming emissions from heavy-duty diesel trucks. The “Heavy-Duty Low NOx Omnibus Regulation” will require manufacturers to comply with tougher emissions standards, overhaul engine testing procedures, and further extend engine warranties to ensure that emissions of NOx (oxides of nitrogen, a key component of smog) are reduced to help California meet federal air quality standards and critical public health goals.



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