Question

Select the greenhouse gases from the following:

• A. Oxygen
• B. Water vapour
• C. Ozone
• D. Nitrous oxide

Answer 1

Answer: (B), (C), (D)

The correct options are
B Water vapour
C Ozone
D Nitrous oxide

A greenhouse gas is a gas that absorbs and emits radiant energy within the thermal infrared range, causing the greenhouse effect. The primary greenhouse gases in Earth's atmosphere are water vapor (${\text{H}}_2\text{O}$), carbon dioxide (${\text{CO}}_2$), methane (${\text{CH}}_4$), nitrous oxide (${\text{N}}_2\text{O}$), and ozone (${\text{O}}_3$). Without greenhouse gases, the average temperature of Earth's surface would be about $-18{}^{\circ }\text{C}$, rather than the present average of $15{}^{\circ }\text{C}$.