Water Pollution-All Other Water Troughs Are Just Pail Imitations

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Across
  1. 2. low oxygen levels
  2. 4. Excess nitrogen causes explosive growth of microscopic algae
  3. 5. makes up 36% of sludge and is used as fertilizer
  4. 6. type of process used in secondary sewage treatment
  5. 8. WHO urges people to purify drinking water
  6. 10. toilet which eliminates sewage output
  7. 12. dried sludge which can be inhaled
  8. 14. plant nutrient
  9. 18. container which contains genetically modified bacteria which consume pesticides
  10. 19. oil as it comes out of the ground
  11. 21. This bay is the largest estuary in the US
  12. 22. sprinkling these may help clean up oil spills in the future
  13. 24. type of hull which provides more protection against oil spills
  14. 25. other way to disinfect water
Down
  1. 1. 1989 oil spill in Alaska
  2. 2. Clear, Oxygen rich waters promote growth of plankton, sea grasses, and fish
  3. 3. country with unchlorinated water
  4. 7. overpriced "alternative" to tap water
  5. 9. processed petroleum products
  6. 11. food producer which plans to create biodiesel from hog waste
  7. 13. the product of sewage treatment
  8. 15. 2002 oil spill off the coast of Spain
  9. 16. plant nutrient
  10. 17. calls for redesigning the sewage treatment system
  11. 20. these rays will kill waterborne pathogens
  12. 23. largest source of oil pollution