crossword for Mr Saussey

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Across
  1. 2. famous desert
  2. 6. how many people live in the world
  3. 8. house of ice
  4. 9. famous river in Egypt
  5. 11. bear living in cold places
  6. 12. the two extremes of the world
  7. 13. being cut from the outside world
Down
  1. 1. name of a high mountain
  2. 3. forest in brazil
  3. 4. land of ice
  4. 5. natural lake in the middle of nowhere
  5. 7. jungles
  6. 10. land of sand