G7-Chap 18

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Across
  1. 2. A pipe carrying sewage
  2. 4. Liquid Waste Products
  3. 6. Micro-organisms which causes cholera
Down
  1. 1. water Used water
  2. 3. A chemical to disinfect water
  3. 4. Solid Waste extracted in sewage treatment
  4. 5. A word related to hygiene (sanitation) waste matter discharged from human body