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By Ben Tavener, Senior Contributing Reporter

RIO DE JANEIRO, BRAZIL – The recent collision involving the Vale Beijing super-carrier off Maranhão state in Brazil's north-east region has reignited debate over Brazilian mining company Vale’s plan to invest over R$8 billion (US$4.4 billion) into expanding its fleet of enormous cargo ships – over which there are currently six in operation – to some 35 Valemax vessels.

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