A) Carbon dioxide
B) Nitrogen dioxide
C) Carbon monoxide
D) Sulphur dioxide
Correct Answer: A
Solution :
Global warming is the rise in average earth temperature due to the effect of green house gases like \[C{{O}_{2}},CFCs\]etc. Some ecologists expecting that in next fifty year time the temperature of earth shall rise by \[2{}^\circ -5{}^\circ C\]which will lead to mealting of polar ice cap.
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