Five Weeks in a Balloon Crossword

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Across
  1. 2. Carries malaria
  2. 3. Dry barren area
  3. 6. Caused by great heat
  4. 8. African country thats also a name
  5. 10. Thrives with little water
  6. 12. Hot air _ _ _ _ _ _ _
  7. 14. Piece of land surronded by water
  8. 15. Measures atmospheric pressure
  9. 18. "King of the jungle"
  10. 19. User of a rifle
  11. 20. Piece of water surronded by land
  12. 21. Rise in body temperature
  13. 23. Second largest continent
  14. 25. Longest River
  15. 26. Scavanger bird
  16. 28. Zimbabwean waterfall
  17. 29. Known for its hump
  18. 30. London's country
  19. 31. Thunder _ _ _ _ _
Down
  1. 1. Holder of medical degree
  2. 4. _ _ _ _ _ _ of Gibraltar
  3. 5. Aquatic land animal
  4. 7. Horned herbivore
  5. 8. One that eats its own kind
  6. 9. Dry grassland
  7. 11. Vertical drop in a river
  8. 13. Largest Desert
  9. 16. Caffinated drink
  10. 17. Ocean west of Africa
  11. 22. Animal with a trunk
  12. 24. Tropcial forest
  13. 26. Spews hot lava
  14. 27. Essential for life