Identify the correct pair of various greenhouse gases and their contribution to global warming.

Which of the following is not a greenhouse gas?

Which of the following represents the correct percentage contribution of greenhouse gases to total global warming?

Choose the correct option for the proportion of various greenhouse gases contributing to global warming.

Study carefully the following pie diagram representing the relative contribution of various greenhouse gases to total global warming. Identify the gases $A, B, C$ and $D$.

Without the greenhouse effect, the average temperature at the surface of the Earth would have been $ -18 \, ^\circ C $ rather than the present average of $ 15 \, ^\circ C $.