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EPA Proposes Stronger Standards for Heavy-Duty Vehicles to Promote Clean Air

U.S. Environmental Protection Agency (EPA) is proposing new, stronger standards to promote clean air and reduce pollution from heavy-duty vehicles and engines starting in model year (MY) 2027. The proposed standards would reduce emissions of smog- and soot-forming nitrogen oxides (NOx) from heavy-duty gasoline and diesel engines and set updated greenhouse gas (GHG) standards for certain commercial vehicle categories.

“Seventy-two million people are estimated to live near truck freight routes in America, and they are more likely to be people of color and those with lower incomes. These overburdened communities are directly exposed to pollution that causes respiratory and cardiovascular problems, among other serious and costly health effects,” said EPA Administrator Michael S. Regan. “These new standards will drastically cut dangerous pollution by harnessing recent advancements in vehicle technologies from across the trucking industry as it advances toward a zero-emissions transportation future.”

Consistent with President Biden’s Executive Order, “Strengthening American Leadership in Clean Cars and Trucks,” the proposed action would reduce NOx emissions from trucks by as much as 60 percent in 2045. It would result in widespread air quality improvements across the United States, especially in areas already overburdened by air pollution and diesel emissions. The benefits of the proposed rule would exceed its costs by billions of dollars. EPA estimates that by 2045 the most ambitious option outlined in today’s proposal would result in the following annual benefits:

  • Up to 2,100 fewer premature deaths

  • 6,700 fewer hospital admissions and emergency department visits

  • 18,000 fewer cases of asthma onset in children

  • 3.1 million fewer cases of asthma symptoms and allergic rhinitis symptoms

  • 78,000 fewer lost days of work

  • 1.1 million fewer lost school days for children

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