At the global scale relative contributions of CO2, CH4, N2Oand CFCs towards global warming are:
A. 50 %, 30 %, 10 % , and 10 % respectively
B. 76%, 16%, 6%, and 2% respectively
C. 40 %, 30%, 20% and 10% respectively
D. None of the above
Answer:B
At the global scale relative contributions of CO2, CH4, N2Oand CFCs towards global warming are:
A. 50 %, 30 %, 10 % , and 10 % respectively B. 76%, 16%, 6%, and 2% respectively C. 40 %, 30%, 20% and 10% respectively D. None of the above
Explanation: At the global scale, the key greenhouse gases emitted by human activities are: