Question

What is sewage? Explain why it is harmful to discharge untreated sewage into rivers or seas.​

Answer 1

Answer:

Sewage is a liquid containing wastes which is disposed by households, industrial and agricultural activities in water. It is harmful to discharge untreated sewage into rivers or seas because it can pollute the whole sources of water. Sewage contains harmful substances and disease causing organisms

Explanation:

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Answer 2

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Water containing liquid wastes disposed from domestic household activities, industrial activities and agricultural activities is termed as sewage.

The untreated sewage can harm the rivers or seas as the contaminated water pollutes the whole source of water.As the sewage water may contain harmful substances and disease causing organisms, it is dangerous to release untreated sewage into the water.

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