Relative contributions of CO2, CH4, CFCs and N2O towards global warming are: 

I. 50 %, 30 %, 10 % , and 10 % respectively 

II. 60%, 20%, 14%, and 6% respectively 

III. 40 %, 30%, 20% and 10% respectively 

IV. None of the above 

(a) Only II (b) Only III (c) Only I (d) None of the above

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2 Answers

(a) CO2 is largest contributor towards global warming.

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Correct option: (b) 60%, 20%, 14%, and 6% respectively

Explanation:

CO2 is the largest contributor towards global warming, followed by methane, CFCs and N2O.

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