UPSC Civil Service Exam Questions - Engineering

Q1:

Eutrophication of water bodies is caused by the

A discharge of toxic substances

B excessive discharge of nutrients

C excessive discharge of suspended solids

D excessive discharge of chlorides

ANS:B - excessive discharge of nutrients

Excessive richness of nutrients in a lake or other body of water, frequently due to run-off from the land, which causes a dense growth of plant life.