Rare Earth Elements

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Hank reveals why our love affair with the rare earth elements has a dark side. • Like SciShow on Facebook:   / scishow   • Follow SciShow on Twitter:   / scishow   • References: • http://washingtonindependent.com/1014.... • http://www.nytimes.com/2011/03/09/bus.... • http://minerals.usgs.gov/minerals/pub...

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