International measures for halting the destruction of the ozone layer stipulate that chlorofluorocarbons (CFCs( in refrigeration equipment must be replaced by hydrochlorofluorocarbons (HCFCs) and hydrofluorocarbons (HFCs), which do not damage the ozone layer. Unfortunately, they do contribute significantly to climate change because they contain chlorine, which makes them far more powerful greenhouse gases than carbon dioxide. The anticipated increase in the use of HFCs by the year 2050 will contribute as much to global warming as all the private cars on the planet put together.
Refrigerators are available that contain neither CFCs no HCFCs but use isobutane instead. When you change your refrigerator, find out about models that do not either damage the ozone layer or contribute to climate change.
-Abrams, “365 Ways To Save The Earth”, 2008