Question

Which one of the following is held responsible for the depletion of earth’s ozone layer?

Options

• Carbon dioxide

• Ethane

• Sulphuric acid

• Chlorofluorocarbons

Answer 1

Chlorofluorocarbons

Explanation:

Chlorofluorocarbons are chemical compounds used in aerosol sprays, refrigeration, air conditioners, and foam production. When released into the atmosphere, CFCs rise to the stratosphere where ultraviolet (UV) light breaks them down, releasing chlorine atoms. These chlorine atoms act as catalysts in the destruction of ozone molecules, leading to the thinning of the ozone layer, commonly known as the “ozone hole.” This depletion lets harmful UV radiation reach the Earth's surface, causing health and environmental problems. The Montreal Protocol was established to phase out the production of CFCs due to their ozone-depleting effects.