Which two of the following major greenhouse gases contribute to global warming?

1.Nitrous oxide

2.Carbon dioxide

3.Methane

4.Chlorofluorocarbons

A1 and 3

B1 and 4

C2 and 3

D2 and 4

🔒 Answer hidden — practise on Mcqkart to check yourself and see the explanation.

Want more like this? Create a free account to practise a full test, track your progress, and get spaced-repetition review.