Source: TransportTopics

The U.S. Environmental Protection Agency announced a proposed rulemaking to further restrict emissions of soot-forming nitrogen oxide (NOx) by heavy-duty diesel and gasoline engines starting in model year 2027.

EPA’s intention is to reduce NOx emissions from trucks by as much as 60% in 2045.

The current NOx standard is 0.2 gram per brake horsepower-hour, and was adopted in 2010.

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