In its global quest for commodities, China relies on laborers -- from hand diggers in Katanga to iron ore miners in Peru -- who work in unsafe, unsanitary and sometimes lethal conditions. [refers to Gecamines, Zhejiang Huayou Cobalt, Nokia, Sony, Samsung, Chambishi Nonferrous Mines, Shougang, CNPC, Congo Dong Fang, Katanga Mining, South China Mining, Feza Mining, Congolaise des Mines et de Developpement (part of Gecamines), DGI Intl, Cota Mining, Societe pour le Traitement du Terril de Lubumbashi (STL - joint venture OM Group, Forrest Group & Gecamines) - includes comments by companies]