what are the significance of four different colours of dustbins

Different colors of dustbins are used for segregating waste material
  1. Green: organic waste
  2. Yellow: glass
  3. White:  paper 
  4. Grey:  metal
  5. Blue:  plastic
  6. Red: hazardous material

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Green-coloured dustbins are meant for garbage materials that are generated from kitchens, plants and animals. These materials decompose and therefore, can be easily mixed with soils, thereby increasing the fertility of the soil. The blue-coloured dustbins contain materials that remain in the environment and therefore need to be recycled

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