9th Class Social Science Drainage Question Bank Very Short Answer Type - Drainage

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


    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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