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Dysprosium and terbium are used in trace amounts to make electric motors lighter, which is important for Hybrid Electric Vehicles and wind turbines. Much of these and other 'rare earth' metals are coming from China where mining practices are harming the environment.
Earth-Friendly Elements Are Mined Destructively - NYTimes.com
Seeded on Mon Feb 15, 2010 1:27 PM EST
Article Source: The New York Times- Enjoy this article? Help vote it up the 'Vine.
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