Across
- 5. Solid waste material
- 6. An illness-causing bacterium, virus
- 7. multiple places that exert pollutions
- 8. A group of microorganisms in the human intestines that can serve as an indicator species for potentially harmful microorganisms associated with contamination by sewage.
- 9. A dramatic change in water temperature that can kill organisms.
Down
- 1. contamination in our streams river oceans etc
- 2. human waste in the water
- 3. the amount of oxygen a ecosystem uses
- 4. A large container that receives wastewater from a house as part of a septic system.