Q. Which one of the following is the correct percentage of the two (out of the total of 4) green house gases that contribute to the total global warming?
A) Methane 20%, N₂O 18%
B) CFCs 14%, Methane 20%
C) CO₂ 40%, CFCs 30%
D) N₂O 6%, CO₂ 86%
Explanation
[Solution from source] The figures in the old NCERT pie chart were CO₂ 60%, CH₄ 20%, CFCs 14% and N₂O 6%. Only the pair CFCs 14% with methane 20% matches; the other options pair one right figure with a wrong one. Answer (2).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.