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Why is the load of biodegradable materia...

Why is the load of biodegradable material dangerous to the water bodies ?

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When the large amount of sewage water enters into the ponds , rivers , lakes , seasand oceans , it reduces the amount of free oxygen . This depletes the respiratoryoxygen levels and causes suffocation for aquatic fauna thereby killing aquatic life . BOD is measured to assess the quality of water with respect to the amount of organic load.
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OSWAAL PUBLICATION-ENVIRONMENTAL ISSUES -TOPIC - 1 ( SHORT ANSWER TYPE QUESTIONS - I)
  1. What is eutrophication ? Explain its consequence on the life of plan...

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  2. Thermal power plants are inevitable in an industrial and densely pop...

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  3. A crane had DDT level as 55m is its body . What would be happen to the...

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  4. How did pollution of environment start ?

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  5. Differentiate between contamination and pollution.

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  6. Name a few pollutants added to air by nature.

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  7. What is the major air pollutant ? Give its source.

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  8. What are radiocative elements ? Cite a few exmple .

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  9. How do radiations affects the cells ?

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  10. How does nature depollutes the air ?

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  11. What is nuclear fall out ? How does it reach living organisms ?

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  12. Which plants can absorb heavy metals ? How is this useful ?

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  13. Give advantages of CNG over pertol or diesel .

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  14. Why are nuclear power plants considered as a therat to ecologyical s...

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  15. Why is the load of biodegradable material dangerous to the water bodi...

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  16. Briefly explain Biological Oxygen Demand in water .

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  17. Why the waste is considered as hazardous and the major enviromental...

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  18. Why are industrial effluents more difficult to manage than municipal...

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  19. How can pollution by domestic sewage be controlled ?

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  20. How can water pollution be controlled ?

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