CFCs (chlorofluorocarbons)
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The gases used in early refrigerators were generally toxic – ammonia, methyl chloride and sulphur dioxide being common. During the 1920s, concern was being expressed over the number of fatalities that were occurring as a result of gas leaks and so the American corporations DuPont, Frigidaire and General Motors began...Explore the subscription options here to get full access to isurv, including downloads.
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