9th Class Social Science Drainage Question Bank 9th CBSE Social Science Drainage

  • question_answer
      How growing demand of water from rivers, affects the quality of water?  

    Answer:

                      More and more water is drained out of the rivers for growing domestic, municipal, industrial and agricultural demands of water, which reduces their volume. On the other hand, a heavy load of untreated sewage & industrial effluents are emptied into the rivers, affecting the quality of water.  


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