Ozone is -----------

Options :
  1. harmful in the upper atmosphere
  2. beneficial in the upper atmosphere
  3. beneficial in the lowest atmosphere
  4. none of the above
Answer and Explanation :-

Answer: Option 2

Explanation:

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Responses


By: bhargavbhatt On: Apr/26/2014

ozone is a one type of layer which is protect to earth from sunlight........

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