BHP Billiton says Brazil dam burst mud tailings chemically stable
MELBOURNE (Reuters) - BHP Billiton said on Thursday that tailings in mud from a dam that burst at an iron ore mine in Brazil and polluted a major river were chemically stable and would not change their composition in water. The comments from BHP, which co-owns the mine's operator Samarco, came after the United Nations said mud from the dam burst was toxic. (Reporting by Sonali Paul; Editing by Shri Navaratnam)