On January 25, 2019, an iron ore mining dam collapsed in Brumadinho, Brazil. The accident was probably the worst mining dam incident in the last three decades, according to the UN. So far, 203 people have been found dead and 105 are still missing, buried underneath the wave of almost 13 million cubic meters of mining waste. At least 305 kilometers of the Paraopeba river are now covered in toxic mud. Vale SA, the company that built the dam, is the world’s largest iron ore producer.