| http://www.w3.org/ns/prov#value | - Author Lisa Margonelli points out that wind turbines, hybrid cars and some other green technologies carry ???their own hefty environmental price tag???, including the use of rare-earth minerals extracted from open-pit mines or imported from places like China.I???ve encountered similar concerns among members of the U.S. intelligence community: In the pursuit of green energy, will we trade our depen
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