Water pollution

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Across
  1. 1. rural areas often use this relatively small and simple sewage treatment system
  2. 7. anthropogenic inputs of nutrients leads to high levels of nutrients
  3. 8. Human made pond lined with rubber meant to hold livestock manure
  4. 11. heavy metal that contaminates water through pipes
  5. 16. non chemical water pollution that occurs when human activities greatly change the water temperature
  6. 20. best indicator species that are harmless and live inside human and other animal intestines
  7. 21. their manufacture in the U.S ended in 1979 but still are present in the environment and can cause
  8. 23. control organisms that pose a threat to crop production and human health
  9. 24. the fairly clear middle water layer
  10. 25. a combination of pipes and lawns as part of the septic system Manurelagoon gross, human-made pools filled with manure from livestock
Down
  1. 2. a large container that is connected to a house and receives its wastewater
  2. 3. anything that sinks to the bottom of septic tanks and forms solid waste
  3. 4. technique used on cargo ships and was designed to prevent future oil spills in the ocean
  4. 5. phenomenon that kills organisms by drastically changing the water temperature
  5. 6. phenomenon resulting in high levels of nitrogen and phosphorus, which adds an abundance of fertility to the soil
  6. 9. particles that attach to plant, soil, or water surfaces through rain, snow, or as gas
  7. 10. pollution that occurs in a diffuse area
  8. 12. the main cause of oil pollution in the oceans
  9. 13. contaminates the soil where military rockets are tested
  10. 14. resulting from livestock operations and human activities, this is a major type of water pollution
  11. 15. areas that are very depleted of oxygen,resulting in little surviving organisms
  12. 17. pollution that occurs in a distinct location
  13. 18. scientists use organisms to tell if disease-carrying pathogens are present
  14. 19. human activities and other sources lead to the contamination of streams, rivers, lakes, oceans, and groundwater
  15. 22. less of this value indicates less pollution in a water body and a higher value indicates more pollution