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Where does dust come from and what is it? | Almanac.com

Where does dust come from and what is it?

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Where does dust come from and what is it?
Dust is particles of less than one millimeter in diameter, regardless of its content. A significant portion of dust is dead skin fragments from human bodies, tobacco smoke, airborne particles of pollen and plants, industrial smoke, clay, and other mineral (soil) matter. Major volcanic eruptions also produce thousands of tons of dust, and dust from outer space can be yet another source.

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