Acid rain has been found to be extremely dangerous. Mention any four effects of acid rain.

Explanation

### Step-by-Step Text Solution:

1. **Introduction to Acid Rain**:
- Acid rain is a form of precipitation that contains high levels of sulfuric and nitric acids. It is primarily caused by emissions of sulfur dioxide (SO2) and nitrogen oxides (NOx) from industrial processes and vehicles.

2. **Effect 1: Increased Soil Acidity**:
- One of the primary effects of acid rain is the increase in soil acidity. This change in pH can negatively affect the growth of crops, making it difficult for farmers to cultivate healthy plants. As a result, agricultural productivity may decline.

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