What causes acid rain ?

Explanation

### Step-by-Step Solution to the Question: What Causes Acid Rain?

**Step 1: Understanding Acid Rain**
- Acid rain is defined as precipitation (rain, snow, sleet, or hail) that has a lower pH than normal rainwater, making it more acidic. The term "acid rain" indicates that the rainwater contains a higher concentration of acids.

**Step 2: Identifying the Components of Acid Rain**
- The primary components that contribute to acid rain are sulfur dioxide (SO₂) and nitrogen oxides (NOₓ). These substances are released into the atmosphere through various human activities.

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