Which water pollution causes the most human health issues?

Explanation

### Step-by-Step Solution:

1. **Understanding Water Pollution**: Water pollution refers to the contamination of water bodies (like rivers, lakes, and oceans) due to harmful substances, which deteriorates the quality of water.

2. **Identifying Major Causes of Water Pollution**: The main causes of water pollution include the release of pathogens, chemicals, and waste materials into water sources.

3. **Focusing on Waterborne Diseases**: Waterborne diseases are illnesses caused by pathogens in contaminated water. They are a significant concern for human health.

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