Chile’s Escondida, the world’s largest copper mine, will make a decision on a US$1bn investment plan this year to carry out three projects to optimize operations, BHP Billiton‘s  base metals president Diego Hernández said. BHP controls 57.5% of Escondida, located in northern region II. Rio Tinto owns 30%, Japan’s JECO corporation 10% and the World Bank’s International Finance Corporation owns 2.5%.