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dbpedia:Smog
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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. 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.
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dbpedia:Asian_brown_cloud dbpedia:Environmental_issue dbpedia:Delhi
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