Refrigerant
Videos
Refrigerants are working fluids that carry heat from a cold environment to a warm environment while circulating between them. For example, the refrigerant in an air conditioner carries heat from a coo
In the stratosphere, ozone (O3) naturally cycles to oxygen gas (O2) and back when it absorbs solar energy (the Chapman cycle). When CFCs are present, sunlight releases chlorine atoms that catalytically convert O3 to O2: Cl reacts with O3 to form ClO and O2, and ClO is then converted back to Cl, which can destroy further ozone. The net result is more oxygen and less ozone.
Disposable refrigerant gas cylinders, using different colors for different refrigerants. (Current guidelines discourage color-coded cylinders.)
Chlorofluorocarbon
Videos
Chlorofluorocarbons and hydrochlorofluorocarbons are fully or partly halogenated hydrocarbons that contain carbon, hydrogen, chlorine, and fluorine. They are produced as volatile derivatives of methan
NASA projection of stratospheric ozone, in Dobson units, if chlorofluorocarbons had not been banned. Animated version.
Freon tanks awaiting CFC reclamation and container recycling in 2012
Air pollution 3