Question

what is use of green, blue and black dustbin

Answer 1

They are for used for segregating wastes.

Green dustbins are used to collect compostable wastes like food wastes, fruit and vegetable scraps, leaves ,etc.

Blue dustbins are used to collect mixed dry recycling materials like aerosol spray cans, food tins , cardboard boxes , shampoo, bleach bottles, etc.

Black dustbins are used to collect non recyclable wastes like wood wastes, nappies, sanitary napkins ,etc