A London judge ruled Friday that global mining company BHP Group is liable in Brazil’s worst environmental disaster when a dam collapse a decade ago unleashed tons of toxic waste into a major river, killing 19 people and devastating villages downstream. High Court Justice Finola O’Farrell said that Australia-based BHP was responsible, despite not owning the dam at the time, finding its negligence, carelessness or lack of skill led to the collapse. Anglo-Australian BHP owns 50% of Samarco, the Brazilian company that operates the iron ore mine where the tailings dam ruptured on Nov. 5, 2015. Sludge from the burst dam destroyed the once-bustling village of Bento Rodrigues in Minas Gerais state and badly damaged other towns. Enough mine waste to fill 13,000 Olympic-size swimming pools poured i

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