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The Economist in 2019. It is not that rare earth materials do not exist outside of China, although it sits on the largest quantity: approximately 30-40% of all known rare earth deposits. Rather, extracting the materials is a difficult and highly polluting process that China was willing to take on.. making it practically impossible for competing companies outside China to get a foothold, according to the Danish Institute for International Studies. China s de facto monopoly forms an acute problem: international reliance on them could hamper vital industries and national security at a time of maximum competition between China and the US.

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