By Maria Lopez Conde, Contributing Reporter
RIO DE JANEIRO, BRAZIL – A number of companies created to make use of Brazilian mining giant Vale's iron ore have shut down their operations in Carajás, home to the world’s largest iron ore mine, located in the northern state of Pará. Seven out of the ten companies that once operated in the area have halted production in the last four years, causing unemployment in neighboring cities.
According to an O Globo report, companies . . .
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