Three Hundred Died: Iron Ore Mining Giant Knew The Dam Was Troubled. Industry Group To Develop International Standard For Mine Tailings Facilities

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Brasilia, Brazil

A manager at the world's largest iron ore mining company is reported to have told authorities that the corporate's executive board knew there had been a "decrease in security" at the Brumadinho dam in advance of the catastrophic January burst that caused an estimated 300 deaths.