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TEN PER CENT LAW...

TEN PER CENT LAW

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LAKHMIR SINGH & MANJIT KAUR-OUR ENVIRONMENT-Exercise
  1. Name two predators of snakes in a food web operating in a forest ecosy...

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  2. Fill in the following blanks with suitable words : (a) Ultraviolet r...

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  3. TEN PER CENT LAW

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  4. Write the full form of CFC. Give its one harmful effect.

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  5. Explain how, harmful ultraviolet radiations of sunlight are prevented ...

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  6. What are the causes of depletion of ozone layer ? Which diseases are l...

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  7. Explain how harmful chemicals enter our bodies.

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  8. If we excessively use pesticides to protect the crops from diseases, t...

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  9. What is meant by biological magnification ? With the help of a food ch...

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  10. What is meant by bioconcentration of pesticides ? Which common pestici...

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  11. What is garbage? What does garbage consist of ?

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  12. MODES OF WASTE DISPOSAL

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  13. How can the wastes such as paper, plastic and metal objects be dispose...

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  14. Give a method for the disposal of household wastes such as left-over f...

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  15. What is meant by incineration? For what purpose is it used ?

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  16. How are most of the solid wastes in urban areas disposed of?

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  17. State two advantages of using disposable paper cups over disposable pl...

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  18. What is sewage ? How is sewage disposed of ?

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  19. EFFECTS OF OZONE DEPLETION

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  20. What would happen if the ozone layer in the atmosphere completely disa...

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