Which is the largest oasis in the world?

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Tags

1. #agriculture
2. #trees
3. #million
4. #allows
5. #south
6. #world
7. #contained
8. #saudi
9. #otherwise
10. #aquifer
11. #eastern
12. #region
13. #underground
14. #arabia
15. #which
16. #there
17. #desert
18. #largest
19. #round
20. #oasis
21. #located