How is snow-blindness caused in humans ?

Explanation

### Step-by-Step Solution:

1. **Understanding Snow Blindness**:
- Snow blindness is a temporary vision loss or discomfort caused by overexposure to ultraviolet (UV) light, particularly UV-B rays.

2. **Role of Ultraviolet Radiation**:
- UV radiation from the sun can be particularly intense in snowy environments because snow reflects a significant amount of sunlight. This increases the exposure to UV rays.

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