Central idea

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Across
  1. 2. to
  2. 4. needs
  3. 7. people
  4. 9. meet
  5. 11. problems
Down
  1. 1. solve
  2. 3. and
  3. 5. science
  4. 6. apply
  5. 8. understanding
  6. 10. their
  7. 12. of