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Chloroflourocarbons
were discovered in the 1920's by Thomas Midgley, an
organic chemist at General Motors Corporation. He was looking for inert, non-
toxic, non-flammable compounds with low boiling points that could be used as
refrigerants. He found what he was looking for in the form of two compounds:
dichlorodifluoromethane (CFC-12) and trichloromonoflouromethane (CFC-11). In
both compounds, different amounts of chlorine and fluorine are combined with
methane, which is a combination of carbon and hydrogen. These two CFCs were
eventually manufactured by E.I. du Pont de Nemours and company, and, under the
trade name “freon,” constituted 15% ....
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