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Mist and clouds are aerosols.
Because dust particles mostly settle to the ground, this visible dust is a suspension, not an aerosol. Very fine dust, common in the Sahara Desert, however, can constitute an aerosol as it travels on the winds for weeks.

An aerosol is a colloid of fine solid particles or liquid droplets, in air or another gas.<ref name="Hinds, 1999, p. 3">Hinds, 1999, p. 3</ref> Aerosols can be natural or artificial. Examples of natural aerosols are fog, forest exudates and geyser steam. Examples of artificial aerosols are haze, dust, particulate air pollutants and smoke.<ref name="Hinds, 1999, p. 3"/> The liquid or solid particles have diameter mostly smaller than 1 μm or so; larger particles with a significant settling speed make the mixture a suspension, but the distinction is not clear-cut. In general conversation, aerosol usually refers to an aerosol spray that delivers a consumer product from a can or similar container. Other technological applications of aerosols include dispersal of pesticides, medical treatment of respiratory illnesses, and combustion technology.<ref name="Hidy, 1984, p. 254">Hidy, 1984, p. 254.</ref> Diseases can also spread by means of small droplets in the breath, also called aerosols.

Aerosol science covers generation and removal of aerosols, technological application of aerosols, effects of aerosols on the environment and people, and a wide variety of other topics.<ref name="Hinds, 1999, p. 3"/>



Aerosol sections
Intro   Definitions    Size distribution    Physics    Generation and Applications   Stability of generated aerosol particles   Detection    Atmospheric    Effects of Aerosols   See also  References   Works cited    Further reading   External links  

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