CFCs are chemical compounds which are reportedly one of the causes of the rapid depletion of the earth’s ozone layer. CFCs are used in many ways, such as aerosol propellants, refrigerants, cleaning solvents and blowing agents. Chlorofluorocarbons are non-toxic, but when they reach the lower atmosphere of the earth, radiation from the sun decomposes CFCs — leading to a breakdown of radiation-sheilding ozone in the lower stratosphere.