CFC
Production of CFC'sSignificant production of CFC-11 began in the late 1930s for use in refrigeration. Production and release increased slowly until after the Second World War. After 1950 CFC's were also used as propellants for aerosol sprays, and blowing agents in open-cell (foam rubber) and closed-cell (rigid polyurethane) foams. During the 1960s and 1970s their production and release grew very rapidly. In 1975, the U.S. banned the use of CFCs in areosols. This resulted initially in a decline of the releases. In the early 1980s CFC releases increased again because of production increases in countries that did not participate in the CFC ban. The release of CFC-11 declined dramatically after the 1987 Montreal Protocol. Release estimates (in million kg) are available for the period 1931 - 2003.
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