5 Challenges Facing South America’s Copper Boom

Supervisors at BHP’s Escondida, the world’s largest copper mine, said they would strike at 8 a.m. local time Wednesday after government-led mediation failed to produce a contract. The union represents about 1,020 workers at a mine that supplies roughly a quarter of Chile’s copper, and the stoppage follows a walkout at Antofagasta’s Centinela that began Oct. 7. Both land as governments across the A