water population

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Across
  1. 1. excessive riches of nutrients
  2. 3. regulating discharges of pollutants
  3. 4. substances that pollute something
  4. 6. contamination of water
  5. 8. sewage treatment plants
  6. 9. dissolved oxygen
  7. 10. measure of clarity of a liquid
Down
  1. 2. too many nutrients are added to a body of water
  2. 5. made up of fine particles
  3. 7. land run off