The Peruvian city of Cerro de Pasco, perched high up in the Andes, is about to sink — literally and metaphorically — into the deeps of a half-century-old, open-pit zinc and lead mine.
Concentrations of metals in Rio Doce river after catastrophic dam burst "do not significantly differ" from tests by Brazilian Geological Service in 2010.
The miner expects to lower production costs to $1.08 per pound during the 2017 financial year, from a projected $1.21 per pound in the year ending June 2016.