Word: freon
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Dates: during 1970-1979
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...ozone layer acts as a shield for the earth, blocking harmful amounts of ultraviolet radiation. McElroy was among the first to postulate that man-made propellants, such as freon in aerosal sprays, are a primary danger to the ozone layer...
McElroy cited nitrous oxide as another ozone-destroying agent, saying "nitrous oxide and freon act exactly the same...
...seems obvious that Du Pont has finally broken out of a decade in which its sales more than doubled-to $7.3 billion in 1975-but earnings rose hardly at all. One reason is that the recovery is increasing demand for Du Font's famous products, nylon, Dacron, Lucite, Freon, Teflon and thousands of others. Another reason is the policy of Irving S. Shapiro, who became chairman...
This finding adds fertilizer to the growing list of substances though to be harmful to the ozone layer, including SST exhaust, freon and related compounds and the agricultural gumigant methylbromide...
McElroy said that "roughly half" of the freon now being released into the upper atmosphere comes from spray cans. Freon causes most of the reduction of the ozone layer, he said...