Cia. Vale do Rio Doce [CVRD], the world's largest iron ore producer, said it would stop selling ore to pig iron companies suspected of using materials made by slaves in Brazil. “I am not interested in supplying anyone who doesn’t respect the law,” Cia. Vale do Rio Doce Executive Director Tito Martins said...Slaves in Brazil are forced to make charcoal for companies that produce pig iron, which is a key ingredient in steel...[This] [s]teel [is] used in cars made by...nearly all car companies in the U.S...CVRD supplies all the iron ore to pig iron makers in Brazil, said...a professor at the Federal University of Para...By not selling to pig iron companies that rely on slaves, CVRD could essentially stop production at those firms. [also refers to General Motors, Toyota, Companhia Siderurgica do Para (Cosipar), Ford, Kohler, DaimlerChrysler, ThyssenKrupp Waupaca, Nissan]