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Which of the following greenhouse gases is entirely produced by human activities ?

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Which of the following greenhouse gases is entirely produced by human activities ? 
1. Methane
2. Carbon dioxide 
3. Nitrous oxide 
4. Chlorofluorocarbons 
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Correct Answer - Option 4 : Chlorofluorocarbons 

The correct answer is Chlorofluorocarbons.

  • Methane, Carbon dioxide, Nitrous oxide, and Chlorofluorocarbon all are greenhouse gases.
  • But Chlorofluorocarbon(CFC) is a greenhouse gas that is entirely produced by human activities.
  • CFC is generally used as a refrigerant for cooling purposes.
  • Hence the correct answer is Chlorofluorocarbons.

  • Application of CFC
    • Aerosol sprays.
    • Blowing agents for foams.
    • In packing of materials.
    • In solvents.
    • Refrigerants.
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