EPA Urged To Ensure Truck GHG Gains Do Not Dilute Phase 2 Standards

October 22, 2021
As EPA crafts tighter greenhouse gas limits for certain classes of heavy-duty vehicles, sources say the agency must come up with a robust formula to ensure these improvements do not dilute existing “Phase 2” GHG requirements for trucks, or forthcoming Phase 3 standards expected to be even more ambitious. EPA says the new GHG provisions will be issued in parallel with a proposal expected in January to significantly tighten nitrogen oxide (NOx) limits for the entire heavy-duty fleet starting in...

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