A U.S. federal appeals court has revived a lawsuit accusing Rio Tinto Plc of human rights violations related to Papua New Guinea, where it once ran one of the world's largest copper and gold mines. A divided 9th U.S. Circuit Court of Appeals…reversed on Tuesday a lower court's dismissal of claims against the mining giant for genocide and war crimes, while upholding the dismissal of claims for racial discrimination and crimes against humanity. The…case was brought on behalf of about 10,000 current and former residents of the island of Bougainville, arising from Rio Tinto's operations and an uprising in the late 1980s that led to the use of military force and many deaths…Tony Shaffer, a Rio Tinto spokesman, declined to comment.