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A comment on Researchers produce nearly-pure rare earth concentrates from coal. Parent comment

Re:Researchers produce nearly-pure rare earth concentrates f... by Erlangolem on Monday March 12, 2018 @02:52PM (#16570410)
I live and learn, thanks. The particle size I assume is an issue for pulmonary reasons? So sequestered in concrete that wouldn’t be an issue, smart.
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