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life_skals life_skals
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6 years ago
A decrease in the levels of ozone in the ozone layer:
 a. may be related to human use of chlorofluorocarbons.
  b. is not a cause for concern to humans because the ozone layer is in the stratosphere.
  c. cannot possibly be related to any human activities.
  d. is completely unrelated to the incidence of skin cancers in humans.
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6 years ago
A
life_skals Author
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6 years ago
I appreciate this
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