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(a) What are the effects of ozone deplet...

(a) What are the effects of ozone depletion?
(B)BOD is an index of water pollution. Comment.

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The BOD test measures the rate of uptake of oxygen by microorganisms in a sample of water and thus indirectly BOD is a measure of the organic matter present in the water. The greater the BOD of waste water, more is its polluting potential.
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