History of drinking water

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Across
  1. 6. a loss of support below ground
  2. 8. a liquid becoming a gas
  3. 10. water vapor becoming a solid or liquid
  4. 11. seventh step in water treatment system
  5. 14. First people to treat water
  6. 15. what can cause water depletion
Down
  1. 1. water as a gas in the air
  2. 2. rain, snow, sleet, or hail
  3. 3. water source under ground
  4. 4. there are this many molecules in a water drop
  5. 5. water vapor is a form of this
  6. 7. ice is an example of this water stage
  7. 9. state that withdrew most groundwater in 2005
  8. 12. first country to kill germs with chlorine
  9. 13. 3rd stage of water treatment system