Introductory guide to fog, haze, smog
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E-mail China.org.cn, August 19, 2013
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Fog: Fog is a collection of liquid water droplets or ice crystals suspended in the air at or near the Earth's surface.
Haze: Haze is traditionally an atmospheric phenomenon where dust, smoke and other dry particles obscure the clarity of the sky.
Smog: is a type of air pollution; the word "smog" was coined in the early 20th century as a portmanteau of the words smoke and fog to refer to smoky fog.
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