A miner works at the Kiara copper mine, 136 km south of Antofagasta, Chile, after work, on June 22, 2021. - The increase in the price of copper, that overpassed 10, 000 dollars the ton, boosted by the demand from China and the "green" post-pandemic reactivation plan, gave rise to Chilean small mining, while large companies operate at full speed. (Photo by GLENN ARCOS / AFP)