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How can the wastes such as paper, plasti...

How can the wastes such as paper, plastic and metal objects be disposed of ?

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Assertion (A): Wastes such as plastics, paper, vegetable or fruit peels, which are generated in our house daily are biodegradable. Reason (R): Biodegradable wastes can be broken down into simpler, harmless substance in nature in due course of time by the biological processes such as action of microorganisms.

LAKHMIR SINGH & MANJIT KAUR-OUR ENVIRONMENT-Exercise
  1. What is garbage? What does garbage consist of ?

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  2. MODES OF WASTE DISPOSAL

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

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

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

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

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

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

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  9. EFFECTS OF OZONE DEPLETION

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

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  11. (a) With the help of a flow diagram, describe how energy from th sun f...

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  12. (a) What is ozone ? How is it formed ? (b) How does ozone layer prot...

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  13. (a) How is energy introduced into the ecosystem ? (b) Consider the ...

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  14. (a) Explain why, a food chain usually cannot have more than three of f...

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  15. What provides the energy which then flows through a food chain ?

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  16. Which pollutant released into the air during refrigeration and aircond...

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  17. In the given food chain, suppose the amount of energy at fourth trophi...

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  18. Which of the following limits the number of trophic levels in a food c...

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  19. What percentage of sun's energy falling on the leaves of green plants ...

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  20. The depletion of ozone layer in the upper atmosphere is mainly due to ...

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