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Environmental I...

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  • Question 1
    1 / -0

    Why is the concentration of ozone less over the north and south poles?

  • Question 2
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    The purpose of biological treatment of waste-water is to

  • Question 3
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    Protective layer of ozone in the atmosphere exists in which layer?

  • Question 4
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    Good ozone is found in 

  • Question 5
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    Biochemical Oxygen Demand (BOD) in a river water

  • Question 6
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    Fishes die by sewage because  

  • Question 7
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    Phosphorus-32 emits

  • Question 8
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    When huge amount of sewage is dumped into a river, the BOD will

  • Question 9
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    Which one of the following chemicals is responsible for the reduction of ozone content of atmosphere?

  • Question 10
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    What are the chief pollutants of the atmosphere, which are most likely to deplete the ozone layer?

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