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Which among the following, has the lowest Global Warming Potential for a 100-year timescale?
1. CO2
2. CH4
3. N24. SF6

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Correct Answer - Option 1 : CO2

The correct answer is CO2.

  • The Global Warming Potential (GWP) allows comparisons of the global warming impacts of different gases.
  • It is a measure of how much energy the emissions of 1 ton of a gas will absorb over a given period of time, as compared to the emissions of 1 ton of carbon dioxide (CO2).
  • The larger the GWP, the more that gas warms the Earth compared to CO2 over a time period.
  • The period usually used for GWPs is 100 years.
  • GWP thus provides a common unit of measure. So, among all the gases since GWP is compared to CO2; CO2 has the least GWP i.e. 1.

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