Water Pollution

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Across
  1. 3. An illness or malady
  2. 5. No longer alive
  3. 8. Unwanted or unusable material
  4. 9. To damage or injure
  5. 10. Synthetic material made from polymers
  6. 13. Reasons why something happens
  7. 15. Systems of wealth and resources
Down
  1. 1. Areas or regions with a specific feature or use
  2. 2. Waste water and excrement conveyed in sewers
  3. 4. Relating to the commercial production of goods
  4. 6. Substances used in or produced by a process involving changes to atoms
  5. 7. Strong effects or impressions
  6. 11. Communities of living organisms and their physical environment
  7. 12. Relating to people
  8. 14. State of being free from illness or injury