Class 12 Biology Environmental Issues Ozone Depletion in the Stratosphere

Easy

Which one of the following is measured in Dobson units $(DU)$?

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A
Thermal pollution of water
B
Thickness of ozone in a column of air
C
Biochemical oxygen Demand
D
Biomagnification of $DDT$ and Mercury

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Class 12 Questions

Class 12

Biology Questions

Chapter

Environmental Issues

Subtopic

Ozone Depletion in the Stratosphere

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