International agreement to limit CFC production ; stratospheric ozone. Chlorofluorocarbons (CFCs) are chemicals used as refrigerants, cleaning solvents, aerosol propellants, and polystyrene blowing agents.Production capacity cap. • The U.S. issues an "Advance Notice of Proposed Rulemaking" outlining a production capacity cap to limit total CFC uses. 1981. For developed countries, including the United States (U.