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