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Aerosols [...] Such familiar natural phenomena as dust, fog, cloud, mist, haze, fume, smoke, are essentially disperse systems in which a solid or liquid substance is dispersed in a gas -- in most cases, the atmosphere. The use of so many different words to denote naturally or commonly occurring disperse systems, which differ in circumstance rather than in character, leads to a somewhat confused nomenclature. None of these terms is sufficiently comprehensive to include all disperse systems in gases. The term "gaseous dispersoid" suggests that the disperse phase is gaseous rather than the dispersion medium. " Aerosol" is the most satisfactory term, and is analogous to the accepted term "hydrosol", denoting disperse systems in water. [...]
