water resources

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Across
  1. 5. the growing of crops
  2. 7. water that comes from rain
  3. 8. the problem of water shortage
  4. 9. process of water filtration
  5. 10. the supply of water
  6. 13. used water that goes through the recycling process
  7. 14. where water is clean and pure
  8. 15. process of filtering water to remove larger sized particles
  9. 18. refers to the careful use of water resources
  10. 19. being in a weak or unfavourable position
  11. 20. used water that goes through the reclamation process
Down
  1. 1. process of removing salt from sea water
  2. 2. to create new water resources
  3. 3. where water is collected and stored for use
  4. 4. where water is not clean and has impurities
  5. 6. an agreement between two or more countries regarding use of water resources
  6. 11. freshwater that is stored in rivers,streams and lakes
  7. 12. needed for drinking
  8. 16. area where rain falls and is collected
  9. 17. process of forcing water through a special membrane