Green muffer is used against which type of pollution?

Options

A. air
B. soil
C. water
D. noise .

Explanation

**Step-by-Step Solution:**

1. **Understanding the Term "Green Muffler":**
- The term "green muffler" refers to a method of planting trees and vegetation in specific areas to mitigate pollution.

2. **Identifying the Types of Pollution:**
- The question provides four options: air pollution, soil pollution, water pollution, and noise pollution.

3. **Analyzing the Function of Green Muffler:**
- Green mufflers are primarily used to combat noise pollution. This is achieved by planting trees and shrubs along roadsides and in noisy areas.

4. **Mechanism of Noise Reduction:**
- Trees and plants can absorb sound, thereby reducing the overall noise levels in their vicinity. This makes them effective in areas with high traffic or industrial noise.

5. **Conclusion:**
- Based on the analysis, the green muffler is specifically used against noise pollution.

6. **Final Answer:**
- The correct option is noise pollution.

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