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WBCS Preliminary Examination 2020 — General Studies · Question 122 of 200

Q122
General ScienceEnvironment & Ecology
The greenhouse gas that is a product of the combustion of fossil fuels is
  1. a.CO2
  2. b.CH4
  3. c.O3
  4. d.N2O

Answer: (A) CO2

Burning fossil fuels (coal, oil, gas) releases carbon dioxide as its principal greenhouse-gas byproduct.