Juan Carlos Jobet on Tuesday announced a new national mining blueprint that aims to increase the traceability of copper produced in Chile, slash water use and bolster diversity at mining companies.

History has shown that if Beijing feels the economy is losing too much steam, the stimulus taps will be re-opened.

President Laurentino Cortizo pledged that a new contract should provide more public benefit.

The state reserves administration in China released 150,000 tonnes of copper, aluminium and zinc into the market, completing a third round of metal auctions.

Country released another 150,000 tonnes of state metal inventories to the market on Wednesday.

The world needs more aluminum to go green but the smelters that produce the stuff account for around 2% of all man-made emissions each year.

The producers face severe disruption if smelters experience outages and have few alternatives to domestic coal.