Chlorofluorocarbons (CFCs) are a group of man-made chemicals that are used in a variety of products, such as aerosol sprays, refrigerants, and solvents. CFCs are known to be very stable in the atmosphere and can remain there for many years. When exposed to ultraviolet radiation, CFCs break down and release chlorine atoms, which can deplete the ozone layer. This depletion of the ozone layer can lead to increased levels of ultraviolet radiation reaching the Earth's surface, which can cause skin cancer, cataracts, and other health problems. CFCs have been banned in many countries due to their damaging effects on the environment.