Environmental Issues

Bihar Board Class 12 · Biology · 33 past questions

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1. Q20 2018

   Photochemical smog consists of…

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2. Q21 2018

   Snow blindness is human being is caused by…

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3. Q22 2018

   The thickness of ozone in a column of air from the ground to the top of atmosphere is measured in terms of…

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4. Q23 2018

   Which of the following is greenhouse gas?

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5. Q24 2018

   What do you mean by Ozone hole? What are main reasons for Ozone depletion?

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