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What is sewage? In which way can sewage be harmful to us?

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Sewage/municipal waste water is human excreta and other organic wastes containing large number of pathogenic microbes and harmful chemicals. It is harmful to us because

  • Source of various water
  • Causes eutrophication of water
  • Produces scum and sludge, bad taste, foul smell and turbidity to water to which they are dumped.

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