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Abstract
Smog is a newly emerged word for the common man in India. Though smog has a long history and coined in early 20 century by Dr. Henry Antoine des Voeux in his paper, “Fog and Smoke” in July 1905, when the blanket of smoke and fog was noticed over London in early 1900s. In 1950s, a new type of smog called Photochemical smog was found which is most common these days. The name is constructed from the combination of 2 words i.e. ‘smoke’ and ‘fog’.