What would be the impact on the environment around a thermal power plant if its electrostatic precipitator stops functioning? Give a reason.

3

(a)

Microbes play a dual role when used for sewage treatment as they not only help to retrieve usable water but also generate fuel. Write in points how this happens?

3

(a)

What are flocs? State their role in effluent treatment and their ultimate fate in sewage treatment tank.

3

(a)

Create an aquatic food chain in a water body into which effluents flow from a pesticide factory. Diagrammatically represent and answer the following questions:
What is the phenomenon called?

3

(a)

Since the origin of life on earth and evolution there have been 5 episodes of mass extinction, but the current rate of extinction is 100-1000 times. What are the main causes of high extinction rate and how is it going to harm human beings?

3

(a)