[Socio-economic metabolism research: Connotation, discovery, and prospect]

Socio-economic metabolism refers to the human-driven migration and transformation of material and energy within and at the boundary of the socio-economic system. The research of socio-economic metabolism has become the core in industrial ecology. We introduced the connotation and basic steps of socio-economic metabolism research with typical cases, and summarized the main findings of socio-economic metabolism research. The research provide a method and model to track the sources, sinks, and flow path of materials in the socio-economic system, reveal how materials and their socio-economic metabolic processes supported modern production and lifestyle. Related studies have clarified the mechanism by which human activities driving the ecological and environmental problems related to material metabolism. It provides the model and database for evaluating the resource efficiency, the trend of resource supply and demand, and the potential of urban mining. We put forward the future directions of socio-economic metabolism research: to increase research objects and enhance the research precision of each object; to expand and deepen the temporal and spatial boundaries of the research system; to introduce and integrate new data sources and research methods; to connect the material flows of socio-economic metabolism with its related ecological and environmental impacts; and to establish a data platform that could be shared, expanded and accumulated.