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PM2.5 particles are a type of air pollutant that are less than 2.5 micrometers in diameter. They can be emitted from sources such as vehicle exhaust, industrial processes, and wildfires, and can pose health risks when inhaled as they can penetrate deep into the lungs and even enter the bloodstream. High levels of PM2.5 can contribute to respiratory and cardiovascular problems.

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1y ago

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