Oil is important

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Across
  1. 6. Number 9
  2. 7. Number 11
  3. 9. Number 5
  4. 11. Number 6
  5. 12. Number 1
  6. 14. Number 8
  7. 15. Number 7
  8. 17. Number 16
Down
  1. 1. Number 17
  2. 2. Number 4
  3. 3. Number 14
  4. 4. Number 15
  5. 5. Number 10
  6. 8. Number 13
  7. 10. Number 2
  8. 13. Number 12
  9. 16. Number 3