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Rare Earths (RE) have been the focus of much attention in recent years as a consequence of a number of converging factors, prominent among which are: centralization of supply (in China), unique applications in high-end technologies particularly in the low-carbon energy industry, and global demand outstripping availability. Despite this focus, RE supply chain sustainability has not been examined in depth or in any systematic manner. This paper provides an initial review of RE sustainability considerations at present, including current initiatives to understand the research and development needs. The analysis highlights a broad range of areas needing consolidation with future research and calls for collaboration between industry and academia to understand the sustainability considerations of these critical elements in more depth. [ABSTRACT FROM AUTHOR]