What are Polar Stratospheric Clouds (PSCs)?

Explanation

### Step-by-Step Solution:

1. **Definition of Polar Stratospheric Clouds (PSCs)**:
- Polar Stratospheric Clouds (PSCs) are unique types of clouds that form in the stratosphere during the winter months in polar regions.

2. **Location**:
- PSCs are primarily found over Antarctica and the Arctic regions. They can also be observed in other areas such as Scotland, Canada, and Alaska.

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