Arsenic & mercury found in river days after Brazil dam burst

Reuters: Illegal levels of arsenic and mercury polluted the Rio Doce river in the days after a dam burst at an iron ore mine in early November in Brazil's worst-ever environmental disaster, according to tests by a state water agency. The Institute for Water Management in Minas Gerais (IGAM), found arsenic levels more than ten times above the legal limit in one place along the Rio Doce after the dam burst on Nov. 5, killing at least 13 people and flooding thick mud across two states. Mercury slightly above......

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