 Complete the following phrase:  There have been 2 major mining disasters in the Iron Quadrangle in the 2010s. In both cases, tailings dams at mines operated in part by Vale S.A. collapsed, leading to flooding and destruction of the downstream areas, as well as severe environmental contamination. On November 5, 2015, the Fundão dam part of the Germano mining complex in the Mariana region collapsed, causing 19 fatalities and the destruction of around 200 homes. On January 25, 2019, 