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)