Each of us throws a lot of rubbish every day. Do you know where all this rubbish has gone? In some areas with good garbage management, most of the garbage will be treated harmlessly, such as sanitary landfill, incineration and composting. In more places, garbage is often simply piled up or buried, which leads to stinking and pollutes soil and groundwater. The cost of harmless treatment of garbage is very high. According to the different treatment methods, the cost of treating one ton of garbage is about one hundred to several hundred yuan. People consume a lot of resources, produce a lot, consume a lot and produce a lot of garbage.

Don't we have anything to do with garbage? In fact, there is a way, and this is garbage sorting. Garbage classification is to put garbage into the source, and make it become a resource again through sorting, cleaning and recycling.

Judging from the classification methods of municipal solid waste at home and abroad, it is generally classified according to the composition and output of garbage, combined with the resource utilization and treatment methods of local garbage. For example, Germany is generally divided into paper, glass, metal, plastic, etc. Australia is generally divided into compostable garbage, recyclable garbage and non-recyclable garbage; Japan is generally divided into combustible garbage, nonflammable garbage and so on.

At present, domestic garbage in China can be roughly divided into four categories: recyclable garbage, kitchen garbage, harmful waste and other garbage. At present, the commonly used garbage disposal methods mainly include comprehensive utilization, sanitary landfill, incineration for power generation, composting and resource reuse.