Across
- 2. Contamination of water by harmful substances
- 3. Common waste that pollutes rivers and oceans
- 4. Unwanted materials
- 6. Water that flows over land into rivers
- 8. Process of using waste again
- 10. Substance added to soil to help plants grow
- 13. Poisonous substance in water
- 14. Large body of salt water
Down
- 1. Tiny living organisms that can cause disease
- 2. Chemical used to kill insects
- 5. Dirty water from homes and cities
- 7. Place where industrial waste may come from
- 9. Leakage of oil into water
- 11. Cleaning dirty water
- 12. Natural flowing water body