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On June 3, 2026, Auto Innovators submitted comments to the U.S. Environmental Protection Agency (EPA) in response to its proposal to delay Tier 4 criteria emission standards.

By John Bozzella The Environmental Protection Agency (EPA) is out with its proposed light-duty vehicle greenhouse gas (GHG) and multi-pollutant rules for model year 2027 through 2032. Immediate reaction: Two things can be true at the same time (and in thi…