Question

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

Answer 1

Explain why it is harmful to discharge untreated sewage into rivers or seas. Ans. 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.

Answer 2

The wastewater that flows out of houses without treatment is known as sewage.  

Explanation:  

• Sewage is extremely harmful to our bodies as it contains dirt, germs, dust, excretory products and all kinds of harmful substances.
• This sewage water needs to undergo a thorough filtration process where every harmful substance is removed, and then the water needs to be purified in a multi-step process to make it fit again for use and human consumption.