Mapping critical raw materials in green technologies
通过文本挖掘分析专利数据，研究绿色技术对关键原材料的依赖程度、各国依赖差异及主要用户与供应商的联系，为可持续转型政策提供参考。
This paper provides an exploratory analysis of the relationship between critical raw materials (CRMs) and environmental technologies. Using text mining techniques to parse and analyse patent data, we explore: (i) the dependence of green technologies on CRMs; (ii) the countries that are more reliant on CRMs in their green patent portfolios; and (iii) the connections between major users and suppliers of CRMs. Framed in the context of recent policy debates on the viability of the sustainable transition, our study points to the criticalities of both the evolution of green technology and of the spatial distribution of demand and supply of CRMs.