The logo of the company PGE is seen on a building next to a statue of Saint Barbara, the patron saint of miners, at the Turow open-pit coal mine in Bogatynia, Poland, June 15, 2021. Picture taken June 15, 2021. REUTERS/David W Cerny

Coal miners prepare to work in coal mine Abid Lolic in Nova Bila, Bosnia and Herzegovina May 12, 2021. Picture taken May 12, 2021. REUTERS/Dado Ruvic

Coal miners enter to mine in coal mine Abid Lolic in Nova Bila, Bosnia and Herzegovina May 12, 2021. Picture taken May 12, 2021. REUTERS/Dado Ruvic

Coal miners prepare to work in coal mine Abid Lolic in Nova Bila, Bosnia and Herzegovina May 12, 2021. Picture taken May 12, 2021. REUTERS/Dado Ruvic

Coal miners prepare to work in coal mine Abid Lolic in Nova Bila, Bosnia and Herzegovina May 12, 2021. Picture taken May 12, 2021. REUTERS/Dado Ruvic

A coal miner smiles before working in coal mine Abid Lolic in Nova Bila, Bosnia and Herzegovina May 12, 2021. Picture taken May 12, 2021. REUTERS/Dado Ruvic

Coal miners smoke before working in coal mine Abid Lolic in Nova Bila, Bosnia and Herzegovina May 12, 2021. Picture taken May 12, 2021. REUTERS/Dado Ruvic

Coal miners enter to mine in coal mine Abid Lolic in Nova Bila, Bosnia and Herzegovina May 12, 2021. Picture taken May 12, 2021. REUTERS/Dado Ruvic

Coal miners sit before working in coal mine Abid Lolic in Nova Bila, Bosnia and Herzegovina May 12, 2021. Picture taken May 12, 2021. REUTERS/Dado Ruvic

Coal miners sit before working in coal mine Abid Lolic in Nova Bila, Bosnia and Herzegovina May 12, 2021. Picture taken May 12, 2021. REUTERS/Dado Ruvic

A coal miner sits before working in coal mine Abid Lolic in Nova Bila, Bosnia and Herzegovina May 12, 2021. Picture taken May 12, 2021. REUTERS/Dado Ruvic

Coal miners prepare to work in coal mine Abid Lolic in Nova Bila, Bosnia and Herzegovina May 12, 2021. Picture taken May 12, 2021. REUTERS/Dado Ruvic

Coal miners sit before working in coal mine Abid Lolic in Nova Bila, Bosnia and Herzegovina May 12, 2021. Picture taken May 12, 2021. REUTERS/Dado Ruvic

A coal miner prepares to work in coal mine Abid Lolic in Nova Bila, Bosnia and Herzegovina May 12, 2021. Picture taken May 12, 2021. REUTERS/Dado Ruvic

An artisanal tin miner pulls a rope while working on a pontoon off the coast of Toboali, on the southern shores of the island of Bangka, Indonesia, May 1, 2021. REUTERS/Willy Kurniawan SEARCH "KURNIAWAN TIN" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

An artisanal tin miner holds a suction hose as he works on a pontoon off the coast of Toboali, on the southern shores of the island of Bangka, Indonesia, May 1, 2021. REUTERS/Willy Kurniawan SEARCH "KURNIAWAN TIN" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

Artisanal tin miners install a suction pipe on a pontoon off the coast of Toboali, on the southern shores of the island of Bangka, Indonesia, May 1, 2021. REUTERS/Willy Kurniawan SEARCH "KURNIAWAN TIN" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

An artisanal tin miner uses a plastic tub to check the sand of tin ore while working on a pontoon off the coast of Toboali, southern shores of the island of Bangka, Indonesia, May 1, 2021. REUTERS/Willy Kurniawan SEARCH "KURNIAWAN TIN" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

Hendra, 51, a tin miner, stands on top of his pontoon while monitoring the mining operation off the coast of Toboali, on the southern shores of the island of Bangka, Indonesia, May 1, 2021. Hendra operates six pontoons, each manned by three to four workers. He is among scores of artisanal miners who partner with PT Timah to exploit the state miner's concessions. The miners are paid about 70,000 to 80,000 rupiah ($4.90 to $5.60) per kg of tin sand they pump up, and a pontoon typically produces about 50 kg a day, Hendra said. REUTERS/Willy Kurniawan SEARCH "KURNIAWAN TIN" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

Hendra, a 51-year-old tin miner, sits on a wooden boat with other miners as they head to their pontoons off the coast of Toboali, on the southern shores of the island of Bangka, Indonesia, May 1, 2021. "On land, our income is diminishing. There are no more reserves," said Hendra, who shifted to work in offshore tin mining about a year ago after a decade in the industry. "In the ocean, there are far more reserves." REUTERS/Willy Kurniawan SEARCH "KURNIAWAN TIN" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

Unlicensed miners work in a tin mining area in Toboali, on the southern shores of the island of Bangka, Indonesia, April 29, 2021. Miners who continue working on land have to deploy expensive heavy machinery to dig deeper for tin ore as reserves dwindle. Amri, an unlicensed miner, said he had restarted his land operations after a 14-month hiatus when tin prices rose due to tighter global supplies. REUTERS/Willy Kurniawan SEARCH "KURNIAWAN TIN" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

An unlicensed miner takes a break while working in a tin mining area in Toboali, on the southern shores of the island of Bangka, Indonesia, April 29, 2021. Miners who continue working on land have to deploy expensive heavy machinery to dig deeper for tin ore as reserves dwindle. Amri, an unlicensed miner, said he had restarted his land operations after a 14-month hiatus when tin prices rose due to tighter global supplies. REUTERS/Willy Kurniawan SEARCH "KURNIAWAN TIN" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

Unlicensed miners work in a tin mining area in Toboali, on the southern shores of the island of Bangka, Indonesia, April 29, 2021. Miners who continue working on land have to deploy expensive heavy machinery to dig deeper for tin ore as reserves dwindle. Amri, an unlicensed miner, said he had restarted his land operations after a 14-month hiatus when tin prices rose due to tighter global supplies. REUTERS/Willy Kurniawan SEARCH "KURNIAWAN TIN" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

Dimas Putra Hermawan, 17, and other artisanal tin miners prepare washed glittery black sand of tin ore while working on a pontoon off the coast of Toboali, on the southern shores of the island of Bangka, Indonesia, April 29, 2021. REUTERS/Willy Kurniawan SEARCH "KURNIAWAN TIN" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

Dimas Putra Hermawan, 17, an artisanal tin miner, washes glittery black sand of tin ore, as he works on a pontoon off the coast of Toboali, on the southern shores of the island of Bangka, Indonesia, April 29, 2021. REUTERS/Willy Kurniawan SEARCH "KURNIAWAN TIN" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

An artisanal tin miner rests as children swim near a pontoon off the coast of Toboali, on the southern shores of the island of Bangka, Indonesia, April 29, 2021. REUTERS/Willy Kurniawan SEARCH "KURNIAWAN TIN" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

Dimas Putra Hermawan, 17, and another artisanal tin miner prepare a rope while installing a suction pipe and hose on a pontoon, off the coast of Toboali, on the southern shores of the island of Bangka, Indonesia, April 29, 2021. REUTERS/Willy Kurniawan SEARCH "KURNIAWAN TIN" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

An artisanal tin miner pulls a rope while working on a pontoon off the coast of Toboali, on the southern shores of the island of Bangka, Indonesia, April 29, 2021. REUTERS/Willy Kurniawan SEARCH "KURNIAWAN TIN" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

Artisanal tin miners carry a sack of tin sand to be checked, weighed and collected at a shore in Toboali, southern shores of the island of Bangka, Indonesia, April 29, 2021. REUTERS/Willy Kurniawan SEARCH "KURNIAWAN TIN" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

Hendra, 51, a tin miner, shows the sand of tin ore on a pontoon off the coast of Toboali, on the southern shores of the island of Bangka, Indonesia, April 29, 2021. "On land, our income is diminishing. There are no more reserves," said Hendra, who shifted to work in offshore tin mining about a year ago after a decade in the industry. "In the ocean, there are far more reserves." REUTERS/Willy Kurniawan SEARCH "KURNIAWAN TIN" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

Miners work at the Progress coal mine near the rebel-controlled city of Torez in Donetsk Region, Ukraine April 29, 2021. REUTERS/Alexander Ermochenko

Miners work at the Progress coal mine near the rebel-controlled city of Torez in Donetsk Region, Ukraine April 29, 2021. REUTERS/Alexander Ermochenko

A miner works at the Progress coal mine near the rebel-controlled city of Torez in Donetsk Region, Ukraine April 29, 2021. REUTERS/Alexander Ermochenko

Miners work at the Progress coal mine near the rebel-controlled city of Torez in Donetsk Region, Ukraine April 29, 2021. REUTERS/Alexander Ermochenko

Elton Debreshi, a miner and at the same time a candidate for deputy shows a chrome stone in Bulqiza, Albania April 22, 2021. Picture taken April 22, 2021. REUTERS/Florion Goga REFILE - CORRECTING YEAR

Locals have beer at a bar near a miner statue in Bulqiza, Albania April 22, 2021. Picture taken April 22, 2021. REUTERS/Florion Goga REFILE - CORRECTING YEAR

Elton Debreshi, a miner and at the same time a candidate for deputy walks at a mining area in Bulqiza, Albania April 22, 2021. Picture taken April 22, 2021. REUTERS/Florion Goga REFILE - CORRECTING YEAR

A miner walks near a mining area in Bulqiza, Albania April 22, 2021. Picture taken April 22, 2021. REUTERS/Florion Goga REFILE - CORRECTING YEAR

Elton Debreshi and his colleague miner wave in a mining area in Bulqiza, Albania April 22, 2021. Picture taken April 22, 2021. REUTERS/Florion Goga REFILE - CORRECTING YEAR

A police officer shows bottled mercury at a makeshift camp in a mineral washing area of an illegal mine, in Buritica, Colombia April 20, 2021. Picture taken April 20, 2021. REUTERS/Luisa Gonzalez

A makeshift camp is seen inside a mineral washing area of an illegal mine in Buritica, Colombia April 20, 2021. Picture taken April 20, 2021. REUTERS/Luisa Gonzalez

Mineral material extracted from an illegal gold mine is seen inside an underground room where the material is processed, in Buritica, Colombia April 20, 2021. Picture taken April 20, 2021. REUTERS/Luisa Gonzalez

A policeman inspects an underground room where mineral material extracted from illegal gold mines is processed, in Buritica, Colombia April 20, 2021. Picture taken April 20, 2021. REUTERS/Luisa Gonzalez

A policeman inspects an underground room where mineral material extracted from illegal gold mines is processed, in Buritica, Colombia April 20, 2021. Picture taken April 20, 2021. REUTERS/Luisa Gonzalez

A policeman enters an underground room where mineral material extracted from illegal gold mines is processed, in Buritica, Colombia April 20, 2021. Picture taken April 20, 2021. REUTERS/Luisa Gonzalez

Burnt trash remains are seen at a mineral washing area of an illegal mine in Buritica, Colombia April 20, 2021. Picture taken April 20, 2021. REUTERS/Luisa Gonzalez

A makeshift camp is seen inside a mineral washing area of an illegal mine in Buritica, Colombia April 20, 2021. Picture taken April 20, 2021. REUTERS/Luisa Gonzalez

A mural of a miner is seen on the facade of Buritica mayor's office in Buritica, Colombia April 20, 2021. Picture taken April 20, 2021. REUTERS/Luisa Gonzalez

A policeman stands next to a well where minerals taken from illegal gold mines are washed in Buritica, Colombia April 20, 2021. Picture taken April 20, 2021. REUTERS/Luisa Gonzalez

Henry Munoz, a retired BHP miner and head of the Concerned Citizens and Retired Miners Coalition of Superior who are opposed to the proposed block-mining project near Oak Flat, points at a page of the final Environmental Impact Statement regarding the Resolution Copper Project and Land Exchange on his patio table at his home in Superior, Arizona, U.S., March 30, 2021. "This land is going to be worthless if there's no water to go with it," Munoz said. Picture taken March 30, 2021. REUTERS/Caitlin O'Hara

Henry Munoz, a retired BHP miner and head of the Concerned Citizens and Retired Miners Coalition of Superior who are opposed to the proposed block-mining project near Oak Flat, poses at his home in Superior, Arizona, U.S., March 30, 2021. "This land is going to be worthless if there's no water to go with it," Munoz said. Picture taken March 30, 2021. REUTERS/Caitlin O'Hara

Henry Munoz, a retired BHP miner and head of the Concerned Citizens and Retired Miners Coalition of Superior who are opposed to the proposed block-mining project near Oak Flat, points to a painting gifted to him by a friend at his home in Superior, Arizona, U.S., March 30, 2021. "This land is going to be worthless if there's no water to go with it," Munoz said. Picture taken March 30, 2021. REUTERS/Caitlin O'Hara

People hold bottles of mineral water from a groundwater spring, accidentally found from groundwater drilling in Kanchanaburi province, Thailand, March 14, 2021. Picture taken March 14, 2021. REUTERS/Prapan Chankaew

People receive bottles of mineral water from a groundwater spring, accidentally found from groundwater drilling in Kanchanaburi province, Thailand, March 14, 2021. Picture taken March 14, 2021. REUTERS/Prapan Chankaew

A view shows a non-operating smelting shop in the town of Nikel in Murmansk Region, Russia February 26, 2021. The smelter, which was the oldest production facility of Russian miner Norilsk Nickel, was closed in 2020 as part of the company's environmental programme aiming to reduce hazardous emissions into the atmosphere. REUTERS/Evgenia Novozhenina

A view shows the logo of Norilsk Nickel company at a non-operating smelting shop in the town of Nikel in Murmansk Region, Russia February 26, 2021. The smelter, which was the oldest production facility of Russian miner Norilsk Nickel, was closed in 2020 as part of the company's environmental programme aiming to reduce hazardous emissions into the atmosphere. REUTERS/Evgenia Novozhenina

A view shows a non-operating smelting shop in the town of Nikel in Murmansk Region, Russia February 26, 2021. The smelter, which was the oldest production facility of Russian miner Norilsk Nickel, was closed in 2020 as part of the company's environmental programme aiming to reduce hazardous emissions into the atmosphere. REUTERS/Evgenia Novozhenina

A view shows a non-operating smelting shop in the town of Nikel in Murmansk Region, Russia February 26, 2021. The smelter, which was the oldest production facility of Russian miner Norilsk Nickel, was closed as part of the company's environmental programme aiming to reduce hazardous emissions into the atmosphere. REUTERS/Evgenia Novozhenina

A view shows a non-operating smelting shop in the town of Nikel in Murmansk Region, Russia February 26, 2021. The smelter, which was the oldest production facility of Russian miner Norilsk Nickel, was closed as part of the company's environmental programme aiming to reduce hazardous emissions into the atmosphere. REUTERS/Evgenia Novozhenina