Chlorofluorocarbons (CFCs) released to the atmosphere through the use of aerosols containing CFCs and as leakages from refrigeration equipment. Other releases may occur from industry producing and using them and other products containing them. There are no any natural sources of CFCs to the environment.

Cause of concern:

● Releases of CFCs have serious environmental consequences. They can destroy the ozone layer, thus reducing the protection it offers the earth from the sun's harmful UV rays.

● CFCs also contribute to Global Warming (through "the Greenhouse Effect").