small-particle pollution

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Noun1.small-particle pollution - air pollution caused by fine particles of soot (as from power plants or diesel engines)
air pollution - pollution of the atmosphere; "air pollution reduced the visibility"
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Small-particle pollution raises blood pressure over the short term by stimulating the nervous system to constrict blood vessels.
NRDC researchers said that 56,000 deaths could be avoided every year in the 239 cities, including 20 cities in California, if pollution rules were changed to cut small-particle pollution.