What cause ozone depletion? Name two factors.

Explanation

### Step-by-Step Solution:

1. **Understanding Ozone Depletion**: Ozone depletion refers to the reduction of the ozone layer in the Earth's stratosphere, which protects the planet from harmful ultraviolet (UV) radiation.

2. **Identifying Causes**: The primary causes of ozone depletion are certain man-made chemicals that release chlorine and bromine when they are broken down in the atmosphere.

3. **First Factor - Chlorofluorocarbons (CFCs)**:
- CFCs are a group of chemicals that were commonly used in refrigeration, air conditioning, and aerosol propellants.
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