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Smog: Visible air pollution in urban areas and now, increasingly, in rural areas. The word was coined in 1905 by Harold Des Veaux, a London physician, to describe natural fog contaminated by smoke. Today it is a synonym for any kind of visible air pollution.
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Tom Skilling is chief meteorologist at WGN-TV. His forecasts can be seen Monday through Friday on WGN-TV News at noon and 9 p.m.
WGN-TV meteorologists Steve Kahn, Richard Koeneman and Paul Dailey plus weather producer Bill Snyder contribute to this page.
