Air Pollution Crossword Puzzle

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Across
  1. 1. a large area of land that collects precipitation and eventually concentrates it into a specific river or aquifer
  2. 3. leakage of radioactive wastes into natural waterways
  3. 5. an underground, porous area of soil that has been saturated with water
  4. 6. phosphorous and nitrogen fertilizers that can lead to eutrophication
  5. 10. trash thrown into any body of water or waterway from boats or from offshore
  6. 12. the amount of oxygen in a body of water in parts per million
  7. 13. the amount of oxygen needed to degrade or decompose a specific amount of organic waste that has entered into a body of water such as a stream or lake
  8. 14. this occurs when the ground level drops due to excessive removal of water from an underground aquifer
Down
  1. 1. the top of the zone of saturation in an underground aquifer
  2. 2. the majority of global water is used for _______________
  3. 4. the #1 water pollution problem for humans in the world is the lack of disease-free ___________________
  4. 7. this occurs when excessive amounts of water are removed from a fresh water aquifer and adjacent saline water moves in to replace the fresh water
  5. 8. heated water from power plant cooling or other industrial processes
  6. 9. suspended soil particles caused by excessive erosion
  7. 11. human waste that contains nutrients and pathogens