Which of the following mainly causes the depletion of the ozone layer?

Correct option is D

Correct Answer:(d) Chlorofluorocarbons (CFCs)
Explanation:
· The depletion of the ozone layer is primarily caused by the release of chlorofluorocarbons (CFCs) into the atmosphere.
· CFCs, commonly used as refrigerants, propellants in aerosols, and solvents in cleaning products, break down the ozone molecules in the stratosphere.
· When CFCs are released into the atmosphere, they rise up to the ozone layer, where UV radiation breaks them down, releasing chlorine atoms that destroy the ozone molecules, leading to thinning of the ozone layer.
Why the other options are incorrect:
· Aviation fuels: While aviation fuels can have some environmental impact, they are not the main cause of ozone layer depletion.
· Volcanic eruptions: Volcanic eruptions release gases like sulfur dioxide, which can contribute to air pollution, but they do not significantly affect the ozone layer in comparison to CFCs.
· Radioactive rays: Radioactive rays are not a primary cause of ozone depletion. The main issue is the breakdown of ozone molecules by chemicals like CFCs.