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OPSC OCS 2019 · Question 73 of 99

Which of the following is the most important greenhouse gas in the earth's atmosphere?

General Studies

  1. ANitrogen dioxide
  2. BCarbon dioxideCorrect
  3. Cwater vapor
  4. DSulphur dioxide

Answer: B. Carbon dioxide

Explanation

carbon dioxide (CO 2 ) Of the greenhouse gases, carbon dioxide ( CO 2 ) is the most prominent. Sources of atmospheric CO 2 include volcanoes, the combustion and decay of organic matter, respiration by aerobic ( oxygen -using) organisms, and the burning of fossil fuels, clearing…

Source: OPSC OCS Prelims 2019 GS Paper-I; answers per hemunda.com unofficial key

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