Panama president sees no environmental threat from copper at closed First Quantum mine
Environmentalists as well as mining companies had raised concerns over risks from leaving the copper on site.
Federal authorities have shut down 12 mines in northern Mexico after inspections spurred by an accident last month that claimed the lives of 14 workers, the labor department said.
Inspectors have already visited 41 of the 100 sites on their list, the department said in a statement.
