We are reporting in accordance with the Global Reporting Initiative (GRI) G3 reporting guidelines for the fourth consecutive year and in accordance with version 3.0 of the Mining and Metals Sector Supplement for the second time. Core indicators are located in the Working Toward Sustainable Development report, other source documents, or directly on our website. We have self-declared the 2011 Working Toward Sustainable Development report, as well as the content referenced in this GRI content index, at the A+ level of the GRI G3 guidelines.

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