Explain how a small amount of chlorofluorocarbons can destroy a large amount of ozone.

Answer:

Ultraviolet radiation breaks down chlorofluorocarbon (CFC) molecules in the stratosphere, releasing chlorine atoms. A chlorine atom reacts with ozone and converts it to oxygen, then is regenerated in a later reaction. Because the chlorine is not used up, one chlorine atom can destroy many ozone molecules.