Hazardous wastes include heavy metals, toxic substances harmful to human health or wastes that cause actual or potential harm to the environment. Including batteries, fluorescent tubes, light bulbs, mercury thermometers, paint buckets, some household appliances, expired drugs and their containers, expired cosmetics, etc. These wastes are usually recycled or landfilled separately.

Other garbage (called dry garbage in Shanghai) includes bricks and tiles, muck, toilet waste paper, paper towels and other wastes that are difficult to recycle, dust, food bags (boxes) and so on. Sanitary landfill can effectively reduce the pollution of groundwater, surface water, soil and air.

Extended data

Garbage classification in Japan—

The largest category is combustible, nonflammable, resource, rough and harmful, and it is subdivided into several subprojects, each of which can be subdivided into grandson projects, and so on.

Combustible: In short, combustible-but excluding plastics, rubber products, general leftovers, and some combustible domestic garbage.

Resources: newspapers, books, plastic beverage bottles, glass beverage bottles.

Non-combustible: waste small household appliances (electric kettle, tape recorder) clothes, toys, ceramic products, iron containers.

Coarse categories: large furniture, large electrical appliances (TV sets, air conditioners), bicycles.

Harmful category: battery, medical waste and substances harmful to human health.