Rio Tinto to invest 3.5 billion-euro in Trás-os-Montes --
Global mining giant Rio Tinto is said to be investing about 3.5 billion-euro in Torre de Moncorvo, in the Trás-os-Montes of northern Portugal, reported LUSA news Thursday, citing an unnamed source close to the negotiations.
Rio Tinto Alcan will invest $36 million at its Laterriere smelter in a two-year project aimed at improving the electrolytic cell control system.