Name three gases which are major air pollutants .

Explanation

To answer the question regarding the three major air pollutants, we can follow these steps:

### Step-by-Step Solution:

1. **Identify Major Air Pollutants**: The first step is to recognize that there are several gases that are considered major air pollutants. Among these, we will focus on three specific gases.

2. **List the Gases**:
- **Carbon Monoxide (CO)**: This gas is produced from incomplete combustion of fossil fuels and is a significant air pollutant due to its toxic nature.
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