which gases are used in refrigerator?
['R-22 Chlorofluorocarbons. This gas is common in older refrigerators, but was ozone-depleting and thus phased out. ... ', 'R-134A Tetrafluoroethane. This gas can currently be seen in the refrigerator. ... ', 'R-438A Freon. ... ', 'R-600A Iso Butane. ... ', 'Tetrafluoroethane. ... ', 'Chlorofluorocarbon. ... ', 'Polystyrene. ... ', 'Acrylonitrile.']