Wed, 25 Aug 2010 14:30:10 +0200 (AFP/BHP BILLITON/File) - BHP Billiton's OlympicDam copper and uranium operation at Roxby Downs in South Australia. BHP Billiton revealed that annual profits more than doubled as the world's biggest miner faces having to hike its 40-billion-dollar takeover offer for fertiliser giant Potash Corp.(AFP/BHP BILLITON/File/Ho)
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