Geography

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Across
  1. 3. petroleum that has not been processed
  2. 4. converts crude oil into products
  3. 5. a thing that has been in the aquifer for a long time
  4. 7. a barrier to travel across Arabian Peninsula
  5. 8. a type of desert such as Dasht-e Kavir
Down
  1. 1. a system that drips water for the crops
  2. 2. the removal of salt from ocean water
  3. 6. a place the size of Texas