Define Ozone hole

Explanation

### Step-by-Step Text Solution:

1. **Definition of Ozone Hole**: The ozone hole refers to a specific area in the ozone layer where the concentration of ozone (O₃) is significantly reduced.

2. **Location**: This phenomenon primarily occurs in the stratosphere, which is one of the five layers of the Earth's atmosphere.

3. **Impact of Ozone Depletion**: The reduction in ozone allows harmful ultraviolet (UV) radiation from the sun to penetrate through the atmosphere more easily.

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