Across
- 3. part of the septic system that uses pipe and the lawn
- 4. used by people connected to a city sewer system
- 6. stage in which sewage is degraded
- 10. oil spill that ran of the coast of Alaska
- 12. single source of pollution from which pollutants are released
- 16. change in temperature that can kill species
- 19. result of human activities that drastically change the temperature
- 21. comes from the feces of animals and humans
- 23. more fertility due to human inputs
- 24. materials not toxic to humans
- 25. most advanced cleaning of water
Down
- 1. solid waste from wastewater
- 2. result of human activities, increases amount of sediment in waterways
- 5. the quality of water decreasing
- 7. # with non added to it
- 8. first stage to remove and clean water
- 9. stops manure from going into groundwater
- 11. drained of oxygen so little life survives
- 13. protects the fish
- 14. watershed dies and releases nitrogen and phosphorus
- 15. how much oxygen water uses
- 17. layer of bacteria
- 18. sets the standard for good drinking water
- 20. tells when pathogens with diseases will be present
- 22. container of the septic system