Question

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

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

Answer 1

The Correct Option is D

To solve the given question, we need to identify which of the listed gases is not a greenhouse gas. Here are the given options:

1. Nitrous oxide
2. Methane
3. Ozone
4. Sulphur dioxide

A greenhouse gas is one that contributes to the greenhouse effect by absorbing infrared radiation. Let's analyze each option:

• Nitrous oxide (N₂O): This is a potent greenhouse gas that traps heat in the atmosphere and contributes to global warming.
• Methane (CH₄): Methane is a significant greenhouse gas with a high heat-trapping ability, much greater than carbon dioxide on a per-molecule basis.
• Ozone (O₃): While ozone high in the atmosphere (stratospheric ozone) protects life on Earth by absorbing harmful UV radiation, ozone in the lower atmosphere (tropospheric ozone) acts as a greenhouse gas contributing to warming.
• Sulphur dioxide (SO₂): This gas is primarily known for causing air pollution and acid rain. Unlike the others, sulphur dioxide does not have significant greenhouse warming properties and instead reflects sunlight, which can have a cooling effect, contrary to the greenhouse warming.

Based on this analysis, the gas that does not fit the definition of a greenhouse gas from the given options is sulphur dioxide (SO₂). Therefore, the correct answer is:

Correct Answer: Sulphur dioxide