Sigma Lithium's waste piles offer no 'imminent risk,' Brazil mining regulator says
Sigma Lithium's waste piles at a Brazilian mine offer no "imminent risk" and the country's mining regulator saw no need to shut them down during a visit last month, the agency told Reuters in a statement on Monday evening.
The ANM's technical staff visited the mine on January 20, about a month and a half after the piles were shut down by labor inspectors who warned of a "grave and imminent risk" to workers and the local community.