The issues associated with the supply of rare-earth metals are a vivid reminder to all of us that natural resources are limited. Japan's Element Strategy Initiative is a good example of a long-term strategy towards the sustainable use of scarce elements.
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Acknowledgements
We acknowledge partial support by the Global COE Program, 'Chemistry Innovation through Cooperation of Science and Engineering', MEXT, Japan, and Strategic Promotion of Innovative Research and Development (Japan Science and Technology Agency). We thank H. Hosono, S. Murai, K. Tamao and T. Nakayama for advice.
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Nakamura, E., Sato, K. Managing the scarcity of chemical elements. Nature Mater 10, 158–161 (2011). https://doi.org/10.1038/nmat2969
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DOI: https://doi.org/10.1038/nmat2969
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