This year’s medals, the largest and heaviest in Olympic history, will be made almost entirely from the raw materials extracted and smelted at the Kennecott Copper Mine, owned by Anglo-Australian mining giant Rio Tinto. But now this mine is also at the centre of a federal lawsuit in the Utah courts, where Rio Tinto Kennecott stands accused of violating the US Clean Air Act for over five years.
See http://www.huffingtonpost.co.uk/meiling-mcnamara/the-great-olympic-greenwa_b_1608432.html.