Short answer questions IV — task. Science State Board, Class 6.

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Give reason for the following statement – Sewage should not be disposed of in rivers or oceans before treatment.

Sewage should not be disposed of in rivers or oceans before treatment. Because

We cannot use the polluted river water for our day to day life.
The rivers and oceans will be polluted if we dispose of sewage before it is treated.
Sewage will reduce the water level.
Pollution will destroy aquatic animals and species.

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16. Short answer questions IV