Water pollution

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