Question

Among the following, the one that is not a green house gas is :

• A. ozone
• B. sulphur dioxide
• C. nitrous oxide
• D. methane

Answer 1

The Correct Option is B

To determine which of the given options is not a greenhouse gas, we need to understand what greenhouse gases are and how they affect the environment.

Greenhouse gases are those that contribute to the greenhouse effect by trapping heat in the Earth's atmosphere. These gases absorb infrared radiation emitted by the Earth and re-emit it back towards the surface, maintaining the planet's temperature. The major greenhouse gases include:

• Ozone (O₃): A secondary greenhouse gas that, although primarily present in the stratosphere, contributes to the greenhouse effect when present in the troposphere.
• Nitrous Oxide (N₂O): A potent greenhouse gas with a significant ability to trap heat, contributing to the warming effect.
• Methane (CH₄): A highly effective greenhouse gas with a global warming potential much higher than carbon dioxide.

The one gas that is not primarily classified as a greenhouse gas among the given options is:

• Sulphur Dioxide (SO₂): This is not a major greenhouse gas. While it can influence climate by forming aerosols that have a cooling effect and can lead to acid rain, it does not trap heat in the same way as the other gases listed.

Thus, the option that is not a greenhouse gas is sulphur dioxide.

In conclusion, despite its environmental impact in other areas, sulfur dioxide is not a direct contributor to the greenhouse effect, unlike the other gases listed.