every where the green blue dustbin are of the same use

No, green and blue coloured dustbins are meant for different purposes.

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.