![]() ![]() Smog is often categorized as being either or winter smog. ![]() Please note that the layout and pagination of this pdf file and the printed. Man-made smog is derived from coal combustion emissions, vehicular emissions, industrial emissions, forest and agricultural fires and photochemical reactions of these emissions. This kind of visible air pollution is composed of nitrogen oxides, sulphur oxides, ozone, smoke and other. The word was then intended to refer to what was sometimes known as, a familiar and serious problem in from the 19th century to the mid-20th century. The word 'smog' was coined in the early 20th century as a blending of the words and to refer to smoky fog, its opacity, and odor. ![]() Smog in as viewed from the in 1988 External audio, Distillations Podcast, 2018 Smog is a type of severe air pollution. ![]()
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