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Greenhouse effect: The heating effect of the Earth’s atmosphere upon the planet; without it, the temperature of the Earth’s surface would average about 0 (degrees)F instead of the present 61 (degrees). If the greenhouse effect strengthens, the Earth’s surface warms.
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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.
