What is the cause of suspended particulate matter in the atmosphere?

Options

A. Availability of oxygen in environment
B. Incomplete combustion
C. Natural disasters
D. Deforestation

Answer

**Step-by-Step Solution:**

1. **Understanding Particulate Matter:**
- Particulate matter (PM) refers to tiny solid and liquid particles that are suspended in the air. These particles can be hazardous to health and the environment.

2. **Sources of Particulate Matter:**
- The main sources of particulate matter include emissions from vehicles, industrial processes, and natural events such as wildfires.

3. **Incomplete Combustion:**
- One significant cause of particulate matter in the atmosphere is incomplete combustion. This occurs when there is not enough oxygen available during the burning process.

4. **Formation of Soot and Smoke:**
- Incomplete combustion leads to the formation of soot and smoke. These substances are made up of fine particles that contribute to the overall particulate matter in the air.

5. **Role of Oxygen Supply:**
- The limited supply of oxygen during combustion is crucial. When combustion occurs in an oxygen-deficient environment, it results in the production of harmful particulate matter.

6. **Conclusion:**
- Therefore, the primary cause of suspended particulate matter in the atmosphere is incomplete combustion, which produces soot and smoke due to limited oxygen supply.

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