Rio Tinto is engaged in finding, mining and processing mineral resources. Co. has four product groups: iron ore, which supplies the global seaborne iron ore trade; aluminium, which includes bauxite mines, alumina refineries, and aluminium smelters; Copper and Diamonds, which has managed operations in Australia, Canada, Mongolia and the U.S., and non-managed operations in Chile and Indonesia, with by-product including gold, silver, molybdenum and others such as sulphuric acid, rhenium, and lead carbonate; and Energy and Minerals, which comprises mining, refining and marketing operations across borates, coal, iron ore concentrate and pellets, salt, titanium dioxide and uranium sectors.