What breaks down the ozone layer?

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  1. #sunlight
  2. #releases
  3. #clouds
  4. #brings
  5. #spring
  6. #contains
  7. #reach
  8. #stratosphere
  9. #sometimes
  10. #substances
  11. #include
  12. #stratospheric
  13. #ozone
  14. #aerosol
  15. #threats
  16. #depleting
  17. #chlorofluorocarbons
  18. #which
  19. #break
  20. #called
  21. #chlorine