 Nyorera kuenderera mberi kweiyi ndima - Kambani iyi yakave nekutadza kwemadhamu maviri e tailings muBrazil: Mariana, muna 2015, uye Brumadinho, muna 2019; njodzi yedhiramu reBrumadinho yakakonzera kuti kambani irasikirwe nerezinesi rekushandisa madhamu masere eMinas Gerais, uye masheya ayo akarasikirwa neinosvika makumi maviri neshanu muzana mukukosha. 