When
the dramatic discovery of the ozone hole in 1986 forced the banning of
chlorofluorocarbons (CFCs), the refrigeration industry switched
to hydrochlorofluorocarbons (HCFCs) and hydrofluorocarbons (HFCs).
HCFC¹s are also ozone depleting substances but less so than CFCs.
Meanwhile, both HCFCs and HFCs are potent greenhouse gasses.