Chlorofluorocarbons (CFCs):
(A) Destroy ozone molecules (B) Increase the atmospheric temperature (C) Produce secondary aerosols (D) Decrease the atmospheric temperature
Choose the correct answer from the options given below:

Correct option is D

Chlorofluorocarbons (CFCs) are synthetic compounds that primarily contribute to the following:
· Destroy ozone molecules (A): CFCs release chlorine atoms in the stratosphere, which catalytically destroy ozone, causing ozone layer depletion.
· Increase atmospheric temperature (B): CFCs are potent greenhouse gases that trap heat in the atmosphere, contributing to global warming.
C and D are incorrect because:
· CFCs do not directly produce secondary aerosols.
· While CFCs deplete the ozone layer, they are not associated with directly decreasing atmospheric temperature.
Information Booster:
1. Ozone Layer Depletion: CFCs break down ozone (O₃) into molecular oxygen (O₂), reducing UV protection.
2. Greenhouse Effect: The global warming potential (GWP) of CFCs is much higher than CO₂.
3. Montreal Protocol (1987): International treaty to phase out ozone-depleting substances, including CFCs.
4. Replacement Chemicals: Hydrofluorocarbons (HFCs) are now used, though they also have greenhouse effects.
5. Sources of CFCs: Refrigerants, aerosol propellants, and foam-blowing agents.