Which pollutant mainly affect the respiratory system in human and animals ?

Options

A. Suspended particulate matter in Air
B. Nitrate pollution in water
C. DDT pollution in soil
D. Hg in water

Answer

**Step-by-Step Solution:**

1. **Identify the Pollutants**: The question asks which pollutants affect the respiratory system in humans and animals. The options provided are:
- Suspended particulate matter in air
- Nitrate pollution in water
- DDT pollution in soil
- Mercury (Hg) in water

2. **Analyze Each Option**:
- **Suspended Particulate Matter in Air**: These are tiny particles that are suspended in the air and can be inhaled. They are primarily produced by sources like automobiles, industrial emissions, and burning of fossil fuels. These particles can penetrate deep into the lungs and cause respiratory issues.
- **Nitrate Pollution in Water**: Nitrates primarily affect the water quality and can lead to health issues when ingested, but they do not directly impact the respiratory system.
- **DDT Pollution in Soil**: DDT is a pesticide that can contaminate soil and water but does not have a direct effect on the respiratory system.
- **Mercury (Hg) in Water**: Mercury is a toxic metal that can cause various health problems, primarily affecting the nervous system, but it does not directly affect the respiratory system.

3. **Conclusion**: Based on the analysis, the pollutant that mainly affects the respiratory system in humans and animals is **suspended particulate matter in air**. Therefore, the correct answer is the first option.

**Final Answer**: Suspended particulate matter in air.

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