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Which gas is mainly responsible for ozone layer depletion?
Question

Which gas is mainly responsible for ozone layer depletion?

A.

SO2_2​​

B.

CO2_2

C.

CFCs

D.

NH3_3​​

Correct option is C

The correct answer is: (c) CFCs

Explanation:
  • Chlorofluorocarbons (CFCs) are the primary gases responsible for ozone layer depletion. When released into the atmosphere, CFCs rise and break down under ultraviolet (UV) radiation, releasing chlorine atoms that destroy ozone molecules.

Information Booster:
  1. Full Form: Chlorofluorocarbons.

  2. Sources: Refrigerants, air conditioners, aerosol sprays, foam-blowing agents.

  3. Effect: One chlorine atom can destroy thousands of ozone molecules.

  4. Control Measure: Banned under the Montreal Protocol (1987) globally.

Additional Information:
  • SO₂ (Sulfur Dioxide): Causes acid rain, not ozone depletion.

  • CO₂ (Carbon Dioxide): Major greenhouse gas, responsible for global warming.

  • NH₃ (Ammonia): Contributes to air pollution but not directly linked to ozone layer damage.

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