The ozone layer protects us from the harmful ultraviolet rays from the Sun. Which of the following air pollutants is destroying the ozone layer?

Options

A. Carbon monoxide
B. Oxides of sulphur
C. Oxides of nitrogen
D. Chlorofluorocarbons

Answer

To answer the question about which air pollutant is destroying the ozone layer, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Ozone Layer**: The ozone layer is a region in the Earth's stratosphere that contains a high concentration of ozone (O3) molecules. It plays a crucial role in protecting life on Earth by absorbing the majority of the Sun's harmful ultraviolet (UV) radiation.

2. **Identify the Pollutants**: The question provides a list of potential air pollutants. We need to evaluate which of these pollutants is known to harm the ozone layer.

3. **Evaluate Each Pollutant**:
- **Carbon Monoxide (CO)**: This is produced from incomplete combustion of fossil fuels. While it is a harmful pollutant, it does not have a direct impact on the ozone layer.
- **Oxides of Sulfur (SO2)**: These compounds are primarily responsible for causing acid rain. They do not significantly affect the ozone layer.
- **Oxides of Nitrogen**: Similar to sulfur oxides, they contribute to acid rain but do not directly destroy ozone.
- **Chlorofluorocarbons (CFCs)**: These are man-made compounds commonly used in refrigeration, air conditioning, and aerosol propellants. CFCs are known to deplete the ozone layer by breaking down ozone molecules in the stratosphere.

4. **Conclusion**: Among the pollutants listed, chlorofluorocarbons (CFCs) are the primary substances that destroy the ozone layer.

### Final Answer:
The air pollutant that is destroying the ozone layer is **Chlorofluorocarbons (CFCs)**.

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