The correct answer is D. Chlorofluorocarbons (CFCs).
CFCs are a group of man-made chemicals that were once widely used in refrigerators, air conditioners, and aerosol cans. They are very stable and do not break down easily in the atmosphere. When they reach the stratosphere, they are broken down by ultraviolet radiation and release chlorine atoms. These chlorine atoms react with ozone molecules, destroying them.
Sulphur dioxide, nitrogen dioxide, and hydrogen sulphide are all pollutants that can contribute to air pollution, but they do not directly cause ozone depletion.
Sulphur dioxide is a gas that is released into the atmosphere when fossil fuels are burned. It can cause respiratory problems and acid rain.
Nitrogen dioxide is also a gas that is released into the atmosphere when fossil fuels are burned. It can cause respiratory problems and smog.
Hydrogen sulphide is a gas that is released into the atmosphere when organic matter decomposes. It has a rotten egg smell and can cause respiratory problems.
CFCs are the main cause of ozone depletion because they are very stable and do not break down easily in the atmosphere. When they reach the stratosphere, they are broken down by ultraviolet radiation and release chlorine atoms. These chlorine atoms react with ozone molecules, destroying them.