The release of municipal wastewater and industrial waste into our natural water bodies is causing disastrous effect to the aquatic life. Explain the biological treatment that should be given to it before releasing into the natural water bodies.

The effluent from the ………..treatment plant is generally released into natural water bodies like rivers and streams.

Drinking water problem in our urban' areas is caused mainly because we fail to protect our water bodies. Explain how accelerated eutrophication chokes our water bodies to death.

Explain the process of sewage water treatment before it can be discharged into natural water bodies . Why is this treatment essential ?

Explain the process of sewage water treacment before it can be discharged into natural water bodies . Why is this treatment essential ?

Sewage containing organic waste should not be disposed in water bodies because it causes major water pollution. Fishes in such a polluted water die because of

Sewage containing organic waste should not be disposed in water bodies because it causes major water pollution. Fishes in such a polluted water die because of

Explain how does the inflow of large amount of nutrients like phosphates and nitrates into the water body drastically affects the aquatic life there. Name the phenomenon responsible.

Assertion : Manures and biofertilizers shuld be used in place of chemical fertilizers. Reason : Chemical fertilizers cause pollution by releasing excess nutrients in water bodies.

Large quantities of sewage is generated everyday in cities and towns, which is treated in Sewage Treatment Plants (STPs) to make it less polluted. Given below is the flow diagram of one of the stages of STP. Observe the given flow diagram and answer the questions accordingly (a) Why primary effluent is passed into large aeration tanks? (b) Write the technical term used for the sediment formed? Mention its significance (c) Explain the final step that results in the formation of biogas in the large tank before the treated effluent is released into water bodies.

Name the world’s most problematic aquatic weed. What in the nature of the water body in which the weeds grow abundantly ?