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Qasim Chishti's blog

Great Smog of London to Great Smog of Lahore: Learning lessons from history

Smog is a kind of air pollution, originally named for the mixture of smoke and fog in the air. Classic smog results from copious amounts of coal burning in an area and is caused by a mixture of smoke and sulfur dioxide. In the 1950s a new type of smog, known as Photochemical Smog, was first described. Smog is a problem in many cities and continues to harm human health.