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   “If you didn’t grow it, you mined it,” I’ve heard said.  Many countries of the world heavily depend on mineral extraction to keep their economies afloat.  Brazil, the locale for this blog, is no exception.  Iron ore is Brazil’s leading export. Brazil ranks third in the world in this regard, just behind China and Australia.  Multinational Vale S.A. dominates Brazil’s diversified metal industry. Vale S.A. holds about half of Samarco S.A., an iron ore extraction company.