Q. Consider the following gases:

1. Water Vapour
2. Ozone
3. Methane

Which of the above is/are primary greenhouse gas/gases?
Answer: 1, 2 and 3
Notes: Primary greenhouse gases in Earth's atmosphere include water vapour, ozone, and methane, along with carbon dioxide and nitrous oxide. Each of the three gases listed—water vapour, ozone, and methane—contributes significantly to the greenhouse effect by absorbing and emitting infrared radiation, thus warming the atmosphere.