Gold, silver, molybdenum and sulphuric acid are all removed from copper ore during processing. Due to the scale of Rio Tinto's copper mining and processing facilities, the company is also a leading producer of these materials, which drive substantial revenues to the company. Sales of copper generated 8% of the company's 2008 revenues, and copper and by-product operations accounted for 16% of underlying earnings. Rio Tinto exclusively provided the metal to produce the 4,700 gold, silver and bronze medals at the London 2012 Olympic and Paralympic Games. This was the second time Rio Tinto had done so for Olympic medals, having previously provided the metals for the Salt Lake City 2002 Winter Olympics. Together, Rio Tinto's share of copper production at its mines totalled nearly 700,000 tonnes, making the company the fourth-largest copper producer in the world. Rio Tinto also owns the naming rights to Rio Tinto Stadium located in nearby Sandy, Utah, and the home of the Major League Soccer team, Real Salt Lake. Aluminium Rio Tinto consolidated its aluminium-related businesses into its aluminium product group (originally named Rio Tinto Alcan), formed in late 2007, when Rio Tinto purchased the Canadian company Alcan for $38.1 billion. Combined with Rio Tinto's existing aluminium-related assets, the new aluminium division vaulted to the world number-one producer of bauxite, alumina and aluminium. Aluminium division kept key leadership from Alcan, and the company's headquarters remain in Montreal. Rio Tinto divides its Aluminium operations into three main areas—bauxite, alumina and primary metal. The Bauxite and Alumina unit mines raw bauxite from locations in Australia, Brazil and Africa. The unit then refines the bauxite into alumina at refineries located in Australia, Brazil, Canada and France. The Primary Metal business unit's operations consist of smelting aluminium from alumina, with smelters located in 11 countries around the world. The Primary Metal group also operates several power plants to support the energy-intensive smelting process. The aluminium division has interests in seven bauxite mines and deposits, six alumina refineries and six speciality alumina plants, 26 aluminium smelters, 13 power plants and 120 facilities for the manufacture of speciality products. The acquisition of Alcan operations in 2007 substantially increased Rio Tinto's asset base, revenues and profits: in 2008, 41% of company revenues and 10% of underlying earnings were attributable to the aluminium division. Uranium: Rio Tinto Energy Rio Tinto Energy is a business group of Rio Tinto dedicated to the mining