Purpose and significance of waste sorting

The benefits of garbage sorting are obviously. The waste being sorted and sent to the processing factory instead of landfill, which will not only save the land resources, but also avoids the pollution caused by landfill or incineration.  In that case  the waste becomes valuable resources. In this battle between people and trash, people turned trash into friends. Therefore, waste separation and collection can reduce the quantity of waste treatment and equipment, and reduce the treatment cost,  the consumption of land resources, therefor to have social, economic, and ecological benefits.