WATER POLLUTION

12345678910111213
Across
  1. 2. Amount of oxygen gas (O₂) that is dissolved in water and available for aquatic organisms to use.
  2. 4. Rapid growth of aquatic plants (often from nutrient pollution)
  3. 5. Excessive nutrient enrichment of water bodies
  4. 6. Metallic elements harmful
  5. 7. Unwanted material often discharged into water bodies
  6. 11. Harmful or poisonous
  7. 12. Substances that make water polluted
  8. 13. Processed wastewater discharged from treatment works
Down
  1. 1. When BOD is higher, water is _________
  2. 3. Polluted liquid that drains from landfills
  3. 8. Solid particle that settle in water
  4. 9. Water flowing over land surface carrying pollutants
  5. 10. Indicator of organic pollutants.