Terrafame mine in Sotkamo

Terrafame mine in Sotkamo

A view of the Terrafame industrial estate in Sotkamo, Finland, on August 3, 2023, with bioleaching piles in the forefront. The Terrafame multimetal mine produces principally nickel and zinc using a bioheap leaching process. LEHTIKUVA / EMMI KORHONEN - FINLAND OUT. NO THIRD PARTY SALES. (Credit:Emmi Korhonen/Lehtikuva/Kyodo News Images)

Terrafame mine in Sotkamo

Terrafame mine in Sotkamo

Bioleaching piles are seen at the Terrafame industrial estate in Sotkamo, Finland, on August 3, 2023. The Terrafame multimetal mine produces principally nickel and zinc using a bioheap leaching process. LEHTIKUVA / EMMI KORHONEN - FINLAND OUT. NO THIRD PARTY SALES. (Credit:Emmi Korhonen/Lehtikuva/Kyodo News Images)

Terrafame mine in Sotkamo

Terrafame mine in Sotkamo

Bioleaching piles are seen at the Terrafame industrial estate in Sotkamo, Finland, on August 3, 2023. The Terrafame multimetal mine produces principally nickel and zinc using a bioheap leaching process. LEHTIKUVA / EMMI KORHONEN - FINLAND OUT. NO THIRD PARTY SALES. (Credit:Emmi Korhonen/Lehtikuva/Kyodo News Images)

Terrafame mine in Sotkamo

Terrafame mine in Sotkamo

Bioleaching piles are seen at the Terrafame industrial estate in Sotkamo, Finland, on August 3, 2023. The Terrafame multimetal mine produces principally nickel and zinc using a bioheap leaching process. LEHTIKUVA / EMMI KORHONEN - FINLAND OUT. NO THIRD PARTY SALES. (Credit:Emmi Korhonen/Lehtikuva/Kyodo News Images)

Terrafame mine in Sotkamo

Terrafame mine in Sotkamo

A view of the Terrafame industrial estate in Sotkamo, Finland, on August 3, 2023, with bioleaching piles in the forefront. The Terrafame multimetal mine produces principally nickel and zinc using a bioheap leaching process. LEHTIKUVA / EMMI KORHONEN - FINLAND OUT. NO THIRD PARTY SALES. (Credit:Emmi Korhonen/Lehtikuva/Kyodo News Images)