Paper 1 · People, Development and Environment
Which of the following fluorinated gases was added as the seventh greenhouse gas by the United Nations Framework Convention on Climate Change?
AHydrofluorocarbons
BPerfluorocarbons
CSulphur hexafluoride
DNitrogen trifluoride ✓ Correct
Correct answer: (D) Nitrogen trifluoride — Nitrogen trifluoride was added as the seventh greenhouse gas, so that is the answer.
Explanation
★Nitrogen trifluoride was added as the seventh greenhouse gas, so that is the answer.
★The UNFCCC lists certain gases as greenhouse gases.
★Nitrogen trifluoride was added later as the seventh one.
★So the seventh added fluorinated greenhouse gas is nitrogen trifluoride.
★Hydrofluorocarbons, perfluorocarbons and sulphur hexafluoride were already listed earlier.
★So the answer is nitrogen trifluoride.
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