- Chile-focused miner Antofagasta said its Centinela and Zaldivar operations had committed to the Copper Mark, an assurance framework to promote sustainable environmental practices in the industry.

'To be granted the Copper Mark, a producer must comply with 32 criteria within two years from the date of submitting a letter of commitment to the copper mark,' the company said.

'Once the Copper Mark has been granted the producer must be independently assessed every three years to demonstrate continued compliance with all the criteria,' it added.

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