Rare-earth elements (REE) — also known as rare-earth minerals or rare-earth metals — are a group of 17 chemical elements of the periodic table. Although most of them are not terribly rare, they are highly strategic substances and vital components in most of the technology we employ every day. What is rare are deposits of these minerals in high enough concentrations to be feasibly and economically extracted. Presently, about 90 per cent of the global supply of rare-earth elements comes from just one country: China.
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