โ™ป๏ธap environmental science review

Particulate matter (PM)

Written by the Fiveable Content Team โ€ข Last updated August 2025
Verified for the 2026 exam
Verified for the 2026 examโ€ขWritten by the Fiveable Content Team โ€ข Last updated August 2025

Definition

Particulate matter refers to tiny solid or liquid particles suspended in the air, such as dust, soot, and smoke. These particles can be harmful when inhaled and contribute to air pollution.

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