Which of the following pairs of gases is mainly responsible for green house effect?

Step-by-step solution

Greenhouse effect and global warming is a natural phenomenon responsible for heating of earth’s surface and atmosphere due to increase in the concentration of CO 2 (64.3%), methane gas (17%) and N 2 O (6%) (greenhouse gases). The surface of the earth re-emits heat in the form of infrared radiation but part of this does not reflect back due to greenhouse gases leads to the heating of the earth's atmosphere. Hence, the right option is 4 carbon dioxide and methane.