The death toll continues to rise in southern Brazil after the collapse of a tailings dam at a mine last month triggered a massive mudslide. In what is being called the country’s worst environmental disaster, 134 people have been confirmed dead and another 199 are still missing in the nearby town of Brumadinho, in Minas Gerais state. Five people have been arrested as part of an investigation into the collapse, and a Brazilian court ordered the mine’s operator, Vale S.A., to stop using eight other tailings dams, which are constructed out of the waste materials left over from mining operations. […]