Positive soil pollution is

Options

A. Reduction in soil productivity due to addition of pesticides fertilizers and industrial wastes
B. Reduction in soil productivity due to erossion and over use
C. Converting fertile land into barren land by dumping ash, garbage
D. All of these

Answer

To solve the question "Positive soil pollution is," we need to analyze the provided options and understand the concept of positive soil pollution as discussed in the video transcript.

### Step-by-Step Solution:

1. **Understanding Soil Pollution**:
- Soil pollution refers to the alteration of soil caused by the addition or removal of substances that decrease its productivity and quality. It can be categorized into two types: negative soil pollution and positive soil pollution.

2. **Defining Positive Soil Pollution**:
- Positive soil pollution specifically refers to the reduction in soil productivity due to the addition of undesirable substances. These substances include pesticides, herbicides, chemical fertilizers, and industrial waste.

3. **Analyzing the Options**:
- **Option 1**: Reduction in soil productivity due to addition of pesticides, fertilizers, and industrial waste.
- This aligns with the definition of positive soil pollution.
- **Option 2**: Reduction in soil productivity due to erosion and overuse.
- This is related to negative soil pollution, not positive.
- **Option 3**: Converting fertile land into barren land by dumping ash and garbage.
- This does not directly relate to positive soil pollution.
- **Option 4**: All of these.
- Since options 2 and 3 do not pertain to positive soil pollution, this option is incorrect.

4. **Conclusion**:
- The correct answer is **Option 1**: Reduction in soil productivity due to addition of pesticides, fertilizers, and industrial waste.

### Final Answer:
**Positive soil pollution is the reduction in soil productivity due to the addition of pesticides, fertilizers, and industrial waste.**

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