Types:
1. Nutrients pollution
2. Surface water pollution
3. Oxygen depleting
4. Ground water pollution
5. Microbiological
Sources:
1. Sewage
2. Agricultural pollution
3. Oil pollution
4. Radioactive substances
5. River and marine dumping
Causes:
1. Industrial waste
2. Sewage and waste water
3. Mining activities
4. Marine dumping
5. Accidental oil leakage
Effects:
1. Death of aquatic life
2. Food chain disruption
3. Harmful economic effects
4. Decrease drinking water for humans
5. Increased cholera cases