Which of the following gases is not green house gas ?

Options

A. CO
B. `O_(3)`
C. `CH_(4)`
D. `H_(2)O` vapours

Explanation

To determine which gas is not a greenhouse gas, we first need to understand what greenhouse gases are and their role in the Earth's atmosphere.

### Step-by-Step Solution:

1. **Definition of Greenhouse Gases**: Greenhouse gases are those gases that can absorb and emit infrared radiation. This process is essential for maintaining the Earth's temperature by trapping heat in the atmosphere.

2. **Common Greenhouse Gases**: Some common greenhouse gases include:
- Carbon dioxide (CO₂)
- Methane (CH₄)
- Nitrous oxide (N₂O)
- Ozone (O₃)
- Water vapor (H₂O)
- Chlorofluorocarbons (CFCs)

3. **Identifying the Options**: The question asks which gas is not a greenhouse gas. We need to look at the options provided (though they are not listed here) and identify which one does not fit the criteria of a greenhouse gas.

4. **Analyzing Carbon Monoxide**: One of the gases mentioned in the video is carbon monoxide (CO). Carbon monoxide is not a greenhouse gas because it does not significantly absorb infrared radiation. Instead, it can affect air quality and is a harmful pollutant.

5. **Conclusion**: Based on the understanding of greenhouse gases and the analysis of carbon monoxide, we conclude that carbon monoxide (CO) is the gas that is not a greenhouse gas.

### Final Answer:
The gas that is not a greenhouse gas is **carbon monoxide (CO)**.

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