CARB has adopted greenhouse gas (GHG) standards that largely align with the U.S. Environmental Protection Agency (EPA) and the National Highway Traffic Safety Administration (NHTSA) GHG standards for new medium- and heavy-duty engines, vehicles, and trailers sold in California. The regulations will reduce GHG emissions from on-road medium- and heavy-duty vehicles.
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CARB Comments on U.S. EPA's Phase 3 GHG Proposed Rule
CARB staff has reviewed the U.S. EPA's Phase 3 GHG Proposed Rule and provides comments.