Vladimir Potanin said the company should keep its dividends to a minimum, as it contends with the pandemic and a potential $2 billion environmental damages bill.
Copper volumes on world exchanges are climbing again as a buoyant economic recovery from covid-19 in top metals consumer China spurred speculators to pile back into the market.
Researchers at Penn State University say that if fracturing and erosion at the surface, and thus oxidation, occur slowly, acid mine drainage can be avoided.