| http://www.w3.org/ns/prov#value | - In addition, we earn further premiums on value-added products.???In normal circumstances, our facilities operate at or near capacity, and fluctuations in volume, other than through curtailments, acquisitions or expansion, generally are small.???The principal components of cost of goods sold are alumina, electrical power, labor and carbon products, which in aggregate exceed 80% of our cost of goods
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