done 8th Science Pollution of Air and Water

• question_answer1)
  What are the different ways in which water gets contaminated?  
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• question_answer2)
  At an individual level, how can you help reduce air pollution?  
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• question_answer3)
  Clear, transparent water is always fit for drinking. Comment.  
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• question_answer4)
  You are a member of the municipal body of your town. Make a list of measures that would help your town to ensure the supply of clean water to all its residents.
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• question_answer5)
  Explain the differences between pure air and polluted air.
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• question_answer6)
  Explain circumstances leading to acid rain. How does acid rain affect us?
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• question_answer7)
  Which of the following is not a greenhouse gas? (a) Carbon dioxide            (b) Sulphur dioxide (c) Methane                       (d) Nitrogen  
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• question_answer8)
  Describe the 'Greenhouse Effect’ in your own words.  
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• question_answer9)
  Prepare a brief speech on global warming. You have to deliver the speech in your class.  
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• question_answer10)
  Describe the threat to the beauty of the Taj Mahal.
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• question_answer11)
  Why does the increased level of nutrients in the water affect the survival of aquatic organisms?
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