Researchers found that mining waste from the 2015 Mariana dam disaster persists in soil and water, entering local crops — indicating ongoing contamination.Credit: Alfribeiro / Getty ImagesKey PointsResearchers found that bananas, cassava, and cocoa grown near the 2015 Fundão dam collapse site contain elevated levels of toxic metals, including cadmium and lead.The study found that consuming bananas from the Doce River estuary area could pose heal…