Across
- 3. biological treamtent of sewage
- 5. small pollution
- 8. president who started EPA
- 10. one source of pollution
- 11. heavy metal with 10 ppb allowed in water
- 13. using booms to control this spill
- 14. Landmark decision to set water standards
- 16. company behind
- 18. area where animal
- 19. indicator of biological polluion
- 20. light a match to contain this oil spill
- 21. waste in water
Down
- 1. company behind Alaskan oil spill
- 2. sediment separation treatment of sewage
- 4. excess algae
- 6. more difficult water to source to fight pollution
- 7. fun environmental disaster
- 9. fish chemical
- 12. if people are not connected to a city sewer system, they probably have this to treat their wastewater
- 15. name of ship in Alaskan oil spill
- 16. oxygen demanded
- 17. large area source of pollution
- 20. fun plastic chemical
- 21. main chemical in rain