Rio Tinto Plc engages in the exploration, mining, and processing of mineral resources. The company operates in over 35 countries, and its portfolio includes iron ore, copper, aluminum and a range of other minerals and materials. Its segments include Iron Ore, Aluminum, Copper, and Minerals. The Iron Ore segment includes iron ore mining and salt and gypsum production in Western Australia. Its iron ore operations in Pilbara comprise an integrated network of over 18 iron ore mines and four independent port terminals. The Aluminum segment includes bauxite mining, alumina refining, and aluminum smelting and recycling. The Copper segment includes mining and refining of copper, gold, silver, molybdenum, other by-products and licensing of extraction technologies. The Minerals segment includes mining and processing of borates, diamonds, iron concentrate and pellets from the Iron Ore Company of Canada, lithium and titanium dioxide feedstock.