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Smog

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China's toxic smog - BBC News

3:53

Air Pollution 101 | National Geographic

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Time-Lapse Video Shows Smog Enveloping Beijing

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Smog "I Feel Like the Mother of the World"

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Damso -Smog lyrics

Smog is a type of air pollutant. The word "smog" was coined in the early 20th century as a portmanteau of the words smoke and fog to refer to smoky fog, its opacity, and odour. The word was then intended to refer to what was sometimes known as pea soup fog, a familiar and serious problem in London from the 19th century to the mid-20th century. This kind of visible air pollution is composed of nitrogen oxides, sulphur oxides, ozone, smoke or dirt particles and also less visible particles such as CFC's. Human-made smog is derived from coal emissions, vehicular emissions, industrial emissions, forest and agricultural fires and photochemical reactions of these emissions.
    • Causes 

    • Photochemical smog 

    • Health effects 

    • Areas affected 

    • Pollution index 

    • Cultural references