Piotr Krzyzewski, KGHM vice president in charge of finance, poses for a photo during an AFP interview at the headquarters of KGHM, the country's metallurgical giant, in Warsaw, on March 27, 2026. Thousands of meters beneath the ground, amid suffocating heat, lies one of the keys to Poland's rumbling mining sector -- and the world economy. (Photo by Wojtek RADWANSKI / AFP via Getty Images)

Unrefined silver plates are stacked in a pile before further processing at the Precious Metals Division of the Glogow smelter in southwestern Poland, owned by KGHM, the metallurgical giant in the country, on March 24, 2026. (Photo by Wojtek RADWANSKI / AFP via Getty Images)

Workers smelt silver ingots known as "the pig sows" at the Precious Metals Division of the Glogow smelter in southwestern Poland, owned by KGHM, the metallurgical giant in the country, on March 24, 2026. Thousands of meters beneath the ground, amid suffocating heat, lies one of the keys to Poland's rumbling mining sector -- and the world economy. (Photo by Wojtek RADWANSKI / AFP via Getty Images)

Ariel Wojciuszkiewicz, a geologist, poses for a photo in a service chamber more than 1,000 meters underground at the PolkowiceSieroszowice copper and silver mine in southwestern Poland, owned by KGHM, the metallurgical giant in the country, on March 25, 2026. Thousands of meters beneath the ground, amid suffocating heat, lies one of the keys to Poland's rumbling mining sector -- and the world economy. (Photo by Wojtek RADWANSKI / AFP via Getty Images)

A worker monitors the electrochemical process of extracting pure copper at a smelter in Glogow in southwestern Poland, owned by KGHM the metallurgical giant in the country, on March 24, 2026. (Photo by Wojtek RADWANSKI / AFP via Getty Images)

General view of the St. James shaft of the PolkowiceSieroszowice copper and silver mine in southwestern Poland, owned by KGHM, the country's metallurgical giant, on March 25, 2026. Thousands of meters beneath the ground, amid suffocating heat, lies one of the keys to Poland's rumbling mining sector -- and the world economy. (Photo by Wojtek RADWANSKI / AFP via Getty Images)

Mining lamps charge in the lamp room at the PolkowiceSieroszowice copper and silver mine in southwestern Poland, owned by KGHM, the country's metallurgical giant. Thousands of meters beneath the ground, amid suffocating heat, lies one of the keys to Poland's rumbling mining sector -- and the world economy. (Photo by Wojtek RADWANSKI / AFP via Getty Images)

A worker monitors the electrochemical process of extracting pure copper at a smelter in Glogow in southwestern Poland, owned by KGHM the metallurgical giant in the country, on March 24, 2026. (Photo by Wojtek RADWANSKI / AFP via Getty Images)