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| 1. |
Question : (a) What are the effects of ozone depletion? (B)BOD is an index of water pollution. Comment. |
| Answer» Solution :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. | |