Explain the following:
Smog

Explanation

### Step-by-Step Solution:

1. **Definition of Smog**:
- Smog is a type of air pollution characterized by a combination of smoke and fog. It appears as a thick, dark fog that reduces visibility and can be harmful to health.

2. **Formation of Smog**:
- Smog is formed through the condensation of water vapor in the atmosphere. When water vapor cools, it condenses into tiny water droplets, creating fog.

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