Waste materials are old (idle) things, or abandoned, and can be recycled as renewable resources. Materials of little value left over from daily production and life. Including: obsolete, scrapped, second-hand, inventory, materials produced by production and life. Such as scrap metal, waste paper, recycled plastics, etc. Even a considerable number of parts in waste household appliances can be reused as renewable resources. Waste is also a kind of resource, but it has not been valued by people. For a long time, it has been adhering to the traditional idea of throwing away second-hand goods and waste products. This not only affects the ecological environment, but also these "treasures" have certain economic value and are a "way to make money" by turning waste into treasure.
The old concept of "garbage collection" has been developed to 20 13 recycling of waste materials. There are many recycling businesses around us, and they have become high-profile billionaires.
Mankind has entered 2 1 century. With a series of environmental problems becoming more and more obvious, people's understanding of the importance of environmental protection is also deepening. Many existing environmental problems are caused by the abuse of resources in the process of industrial economic development in the 20th century. The most typical example is the over-exploitation and utilization of energy and other mineral resources.
The international community has taken necessary measures to solve the contradiction between economic development and environmental protection, and has fully advocated a series of development model strategies, among which circular economy is one.