"13588158-07b6-4294-a00c-fa095b6ad4fd" . "HALOCARBONS"^^ . "Halocarbons containing chlorine and bromine are among the most\npotent greenhouse gases in the atmosphere. They do not occur naturally but\nare produced industrially in large quantities. The best known members of\nthis group of chemicals are the chlorofluorocarbons (CFCs) [see\ndefinition], which are widely used as solvents, refrigerants, spray-can\npropellants and foaming agents. Also significant are the halons,\nbromine-based compounds used as fire-extinguishing agents."^^ . .