Soil is polluted by
pesticides
synthetic fertilisers
green manure
Choose the correct option.

Options

A. I and III
B. I and II
C. II and III
D. All of these

Answer

To determine which substances pollute the soil, let's analyze the options provided:

1. **Pesticides**: These are chemicals used to kill pests that can harm crops. However, their excessive use can lead to soil pollution as they can remain in the soil and affect its quality and the organisms living in it.

2. **Synthetic Fertilisers**: These are man-made fertilizers that provide essential nutrients to plants. While they are beneficial for plant growth, overuse can lead to nutrient runoff, which can contaminate soil and water, leading to pollution.

3. **Green Manure**: This refers to organic matter that is grown and then incorporated into the soil to improve its fertility. Green manure is generally considered beneficial for the soil and does not cause pollution. In fact, it helps in enhancing soil quality.

Based on this analysis, the correct options that cause soil pollution are **pesticides** and **synthetic fertilizers**. Green manure does not contribute to soil pollution.

**Final Answer**: Soil is polluted by **pesticides** and **synthetic fertilizers**.