The contents of garbage sorting are sorted storage, sorted placement and sorted transportation.

Waste classification is a general term for a series of activities to separate waste for storage, placement and transportation according to certain regulations or standards, so as to transform it into public **** resources.

The purpose of garbage classification is to improve the resource value and economic value of garbage, strive to make the best use of things, reduce the amount of garbage disposal and the use of treatment equipment, reduce the cost of treatment, and reduce the consumption of land resources. Garbage can be categorized into recyclables, food waste and other garbage.

The cost of harmless garbage disposal is very high, ranging from about one hundred dollars to several hundred dollars to dispose of one ton of garbage, depending on the method of disposal. People consume a lot of resources, mass produce, consume a lot, and produce a lot of garbage. The consequences will be unimaginable.

From the method of classification of domestic garbage in foreign cities, it is roughly based on the composition of the components of the garbage, the amount of production, combined with the utilization of resources and treatment of local garbage to classify.

For example, Germany is generally divided into paper, glass, metal and plastic; Australia is generally divided into compostable garbage, recyclable garbage, non-recyclable garbage; Japan is generally divided into plastic bottles, recyclable plastics, other plastics, resource garbage, large garbage, combustible garbage, non-combustible garbage and hazardous garbage and so on.

The purpose of waste classification is to divert waste for disposal, utilize existing production and manufacturing capacity, recycle and utilize recyclables, including material utilization and energy utilization, and landfill disposal of useless waste that cannot be utilized for the time being.