Question

Which is the major cause of water pollution?

• A. Sound
• B. $S{O}_2$
• C. $C{O}_2$
• D. Sewage

Answer 1

Answer: (D)

Sewage

• Sewage is what enters the sewerage system from household bathrooms, toilets, kitchens, laundries and drains, or from businesses and industry.
• It is characterized by debris such as paper wrappings, sanitary products, soap residues, and dirt due to the chemical composition of the various waste materials. Plus, sewage water has a foul smell.

• Its disposal into a water body without proper treatment may cause an outbreak of serious diseases and can harm aquatic life and can even disturb the whole ecosystem through biomagnification.

So, option D is correct.