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Eutrophication is the main problem in of rivers due to the adding of more and more nitrates and phosphates.

1. How does it affect aquatic water body

2. What is algal bloom?

3. How does it related to D.O. in water bodies.

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1. It change the colour and quality of water and causes the mortality of fish

2. Presence of large amounts of nutrients in waters also causes excessive growth of planktonic(free-floating) algae, called an algal bloom

3. This results in the decrease of D.O. in water.

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