Desert

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Across
  1. 1. variety
  2. 4. stable
  3. 7. exploit
  4. 10. threats
  5. 11. conservation
  6. 12. harsh
Down
  1. 2. adapt
  2. 3. environment
  3. 5. tribes
  4. 6. destruction
  5. 8. dwellers
  6. 9. decline
  7. 11. crops