cfc free sign - freon, inhaler aerosol component

aerosol air atmosphere ban carbon cfc cfcs chlorine chlorofluorocarbon component composition control danger depletion derivative destructive effect environment ethane fluorine freon halogenated hazardous hydrocarbon hydrochlorofluorocarbons hydrogen icon isolated layer manufacture methane ozone paraffin product prohibition propane propellant refrigerant research sign solvent stop symbol volatile warning