fine suspended particulate matter

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Atmospheric dust or solid particulates in emission products of combustion with an aerodynamic diameter of 2.5 microns or less (also known as PM25) that remain suspended in the atmosphere. Particles of less than 2.5 mm (PM2.5) can penetrate to the alveoli and contribute to pneumoconiosis or chronic respiratory disease.

Subjects: Public Health and Epidemiology.

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