Question
Sanitary landfills.

Answer

  1. Sanitary landfills are the places where wastes are dumped in depression or trench. Wastes are dumped here on everyday basis.
  2. In large metro cities, landfills are over-filled rapidly. Landfills are unhealthy and they may emit foul odour.
  3. Also there is a danger of chemicals percolating and reaching down to ground water and contaminate this water source.

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