Rio Tinto Limited is an international business company engaged in metal and mineral production. The product groups of the Company include aluminum, copper and diamonds, energy and minerals, and iron ore. The business support groups of the Company include exploration, and technology and innovation. The Company produces aluminum, diamonds, iron ore and titanium dioxide feedstock in Canada, and thermal coal, copper, borates and talc in the United States. During the year ended December 31, 2008, the Company owned 30% of the copper mine, Escondida in Chile. During the year ended December 31, 2007, the Company completed the acquisition of Alcan Inc. In December 2010, the Company completed the 100% divestment of its equity holdings in Cloud Peak Energy Inc. In June 2014, Rio Tinto completed the sale of its 50.1% interest in the Clermont Joint Venture to GS Coal Pty Ltd.