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Earlier discussion
2 older comments kept for context.
Favour Onwuchekwa
Chlorofluorocarbons{CFCs} are responsible for the depletion of the ozone layer. [A]
CHUKA MIKE
Chlorofluorocarbons and hydrochlorofluorocarbons are fully or partly halogenated paraffin hydrocarbons that contain only carbon, hydrogen, chlorine, and fluorine, produced as volatile derivative of methane, ethane, and propane. They are also commonly known by the DuPont brand name Freon.
Chlorofluorocarbons (CFCs) are a group of odorless manufactured chemicals. Because they damage the earth's ozone layer they are regarded as pollutants/ harmful as they increase the risk of UV Ray's reaching the earth.