Producers like BHP and Glencore are pitching sites to pilot technologies including electrolysis plants, trolley-assist haulage and regenerative braking.
BHP, which operates the world’s biggest copper mine in Chile, has dangled $10 billion to develop more resources in the country if those uncertainties are finally resolved.
China’s rapid build-up of clean energy is claiming more copper, supporting the market at a time when traditional sources of demand like housing are in the dumps.
