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Ndnd Ndnd
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6 years ago
Ozone depletion at high levels in the atmosphere is caused by:
 a. greenhouse gases b. lightning
  c. burning coal
  d. vehicle exhaust
  e. none of the other choices are correct
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Trejo1426Trejo1426
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6 years ago
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Ndnd Author
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6 years ago
Brilliant
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Yesterday
Helped a lot
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2 hours ago
Good timing, thanks!
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