CFCs do not directly cause cancer, rather they release chlorine atoms which destroy ozone in the atmosphere which causes an increase of UV radiation at ground level. When humans are exposed to this increased UV radiation, the potential for skin cancer increases.
Chlorofluorocarbons contain carbon, chlorine and fluorine atoms.
CFCs fall under the classification of halocarbons. Applications of CFCs expanded to be used in the manufacture of aerosol sprays, solvents, and blowing agents for packing materials and foams. CFCs are extremely stable in the lower atmoshere. Because of this, scientists hailed CFCs as the perfect solution to the world's cooling and propellant needs. However, when CFCs make their way into the upper atmosphere, a significant reaction does occur.