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The mining giant Rio Tinto has decided to make a massive investment in new iron ore production in Australia. The move comes despite a huge surplus of iron ore in world markets, and the firm reporting its worst results in more than a decade. Rio Tinto's first half profits were only half as big as last year, amid challenging conditions in commodity markets. It cut nearly $600m of costs in the same period. The Â鶹Éç's Russell Padmore has been speaking to the firm's new chief executive, Jean-Sebastien Jacques. (Picture: A Rio Tinto operated mine in Mongolia. Picture credit: Getty Images.)