Pollution Controls Failed Within Years on Certain Heavy Duty Trucks

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Tens of thousands of the trucks may still be on the road emitting excessive amounts of health- and climate-damaging black carbon, also known as soot.

Pollution controls that were built into heavy duty trucks nationwide beginning in 2007 began failing on some of those trucks within a decade, leading to significant increases in emissions of black carbon from some of the vehicles, a new study has found.

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