WAEC Biology 2009 Objective — Question 38

Question 38 of 60 from the West African Examinations Council (WAEC) Biology 2009 Objective paper, with the correct answer and a full explanation.

The following gases are greenhouse gases except

A. A. carbon dioxide
B. B. chlorofluorocarbon
C. C. methane
D. D. oxygenCorrect

Explanation

Oxygen does not cause the greenhouse effect in any way. The greenhouse gases are CO2, H2O (water vapour), methane, nitrogen oxides and chlorofluorocarbons.

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