Which gas contributes to global warming through its greenhouse effect?
- ACarbon dioxide
- BNitrous oxide
- CMethane
- DMore than one of the above
- ENone of the above
Show answer and explanation
Correct answer: (d) More than one of the above
Explanation
Carbon dioxide, nitrous oxide and methane all absorb long-wave radiation from the Earth and add to global warming. Since more than one option is correct, the answer is (d).