What do you understand by oil spill?

Explanation

### Step-by-Step Text Solution:

1. **Definition of Oil Spill**: An oil spill is a form of pollution, specifically water pollution, where liquid petroleum is released into marine water bodies or the environment.

2. **Cause of Oil Spills**: Oil spills primarily occur due to human activities. They are not natural occurrences.

3. **Sources of Oil Spills**: The release of crude oil can happen from various sources, including:
- Tankers (ships that transport oil)
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