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"/>
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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