As miners globally look to squeeze more savings amid low prices, the biggest iron-ore miner Vale SA will face a sharp increase in costs if a group of legislators in Brazil’s mining heartland get their way. Spurred by Brazil’s worst-ever environmental disaster, the proposal would toughen supervision and maintenance at existing waste storage facilities in Minas Gerais state and prohibit construction of the cheapest type of tailings dams. The draft bill cleared one commission on Thursday on its way to the state assembly, according to the office of state legislator Agostinho Patrus.
