Smelter workers process copper at the Glogow plant in southwestern Poland, owned by KGHM, the country's metallurgical giant, on March 24, 2026. (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)

Smelter workers process copper at the Glogow plant in southwestern Poland, owned by KGHM, the country's metallurgical giant, on March 24, 2026. (Photo by Wojtek RADWANSKI / AFP via Getty Images)

Workers walk through the grounds of the copper smelter in Glogow 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)

Smelter workers process copper at the Glogow plant in southwestern Poland, owned by KGHM, the country's metallurgical giant, on March 24, 2026. (Photo by Wojtek RADWANSKI / AFP via Getty Images)

Ariel Wojciuszkiewicz, a geologist, adjusts his helmet 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)

Smelter workers process copper at the Glogow plant in southwestern Poland, owned by KGHM, the country's metallurgical giant, on March 24, 2026. (Photo by Wojtek RADWANSKI / AFP via Getty Images)

Workers walk through the grounds of the copper smelter in Glogow 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)