Court Upholds Life-Saving National Soot Air Quality Standard
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Today, the U.S. Court of Appeals for the D.C. Circuit upheld the national, health-based limit on fine particulate matter (PM2.5), also known as soot, that the Environmental Protection Agency (EPA) strengthened in 2024.Soot, made up of tiny toxic particles that lodge deep in the lungs, results in severe health harms, including premature death, and comes from sources like vehicle exhaust pipes, power plants, and factories.The National Ambient Air Quality Standards (NAAQS) for PM2.5 set baseline na
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