Statues and monuments in India are affected by acid rain. How?

Explanation

### Step-by-Step Solution:

1. **Understanding Acid Rain**:
- Acid rain is defined as any form of precipitation (rain, snow, fog) that has a lower pH than normal rainwater, making it acidic. It contains high levels of hydrogen ions and is primarily composed of sulfuric acid and nitric acid.

2. **Formation of Acid Rain**:
- Acid rain is produced from human activities that release oxides of sulfur (SO₂), nitrogen (NO₂), and carbon (CO₂) into the atmosphere. These gases undergo oxidation and react with water vapor to form acids.
- For example:
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