A mineral mixture containing the feed additive Agolin is seen on Johann Dairy in Fresno, California, U.S. September 10, 2020. Picture taken September 10, 2020. REUTERS/Nathan Frandino

A laboratory technician works on Biodiesel 40% (B40) as he holds a bottle of oil at the Research and Development Agency of the Ministry of Energy and Mineral Resources in Jakarta, Indonesia, August 26, 2020. REUTERS/Ajeng Dinar Ulfiana

A laboratory technician works on Biodiesel 40% (B40) at the Research and Development Agency of the Ministry of Energy and Mineral Resources in Jakarta, Indonesia, August 26, 2020. REUTERS/Ajeng Dinar Ulfiana

A laboratory technician works on Biodiesel 40% (B40) at the Research and Development Agency of the Ministry of Energy and Mineral Resources in Jakarta, Indonesia, August 26, 2020. REUTERS/Ajeng Dinar Ulfiana

Laboratory technicians work on Biodiesel 40% (B40) at the Research and Development Agency of the Ministry of Energy and Mineral Resources in Jakarta, Indonesia, August 26, 2020. REUTERS/Ajeng Dinar Ulfiana

Striking workers of the potash producer Belaruskali take part in a rally to protest against presidential election results, in Salihorsk (Soligorsk), Belarus August 19, 2020. The placard reads: "Miner, we stand to the end. Time is on our side!" REUTERS/Vasily Fedosenko

Miners bang their helmets as they make demands, including their salary debt repayment and reforms in the coal industry, in front of the cabinet of ministers headquarters in Kyiv, Ukraine July 6, 2020. REUTERS/Gleb Garanich

Miners bang their helmets as they make demands, including their salary debt repayment and reforms in the coal industry, in front of the building of a presidential administration in Kyiv, Ukraine July 6, 2020. REUTERS/Gleb Garanich

Miners bang their helmets as they make demands, including their salary debt repayment and reforms in the coal industry, in front of the cabinet of ministers headquarters in Kyiv, Ukraine July 6, 2020. REUTERS/Gleb Garanich

Participants attend a rally of miners, who make demands including their salary debt repayment and reforms in the coal industry, in front of the building of a presidential administration in Kyiv, Ukraine June 30, 2020. REUTERS/Gleb Garanich

Miners bang their helmets as they make demands, including their salary debt repayment and reforms in the coal industry, in front of the building of a presidential administration in Kyiv, Ukraine June 30, 2020. REUTERS/Gleb Garanich

Miners bang their helmets as they make demands, including their salary debt repayment and reforms in the coal industry, in front of the building of a presidential administration in Kyiv, Ukraine June 30, 2020. REUTERS/Gleb Garanich

Miners bang their helmets as they make demands, including their salary debt repayment and reforms in the coal industry, in front of the building of a presidential administration in Kyiv, Ukraine June 30, 2020. REUTERS/Gleb Garanich

Bottles of San Pellegrino and Evian mineral water are displayed at a supermarket of Swiss retail group Migros, as the spread of the coronavirus disease (COVID-19) continues, in Zurich, Switzerland June 24, 2020. REUTERS/Arnd Wiegmann

Bottles of San Pellegrino and Evian mineral water are displayed at a supermarket of Swiss retail group Migros, as the spread of the coronavirus disease (COVID-19) continues, in Zurich, Switzerland June 24, 2020. REUTERS/Arnd Wiegmann

People smear themselves with mineral-rich mud on the shore of the Dead Sea in the Israeli-occupied West Bank June 19, 2020. Picture taken June 19, 2020. REUTERS/Ammar Awad

A man, covered with mineral-rich mud, floats in the Dead Sea in the Israeli-occupied West Bank June 18, 2020. Picture taken June 18, 2020. REUTERS/Ammar Awad

Unemployed coal mine workers wear protective face masks while holding a sign reading "Solidarity, miners on fight" during a peaceful protest, following the outbreak of the coronavirus disease (COVID-19) in Concepcion, Chile April 22, 2020. REUTERS/Jose Luis Saavedra

A man, carrying food for miners, walks towards a mine in La Rinconada, the Andes, Peru, October 5, 2019. REUTERS/Nacho Doce

A miner enters a restaurant on a street in La Rinconada, the Andes, Peru, October 5, 2019. REUTERS/Nacho Doce

A miner stands next to a bag of rocks collected from a gold mine in La Rinconada, the Andes, Peru, October 5, 2019. REUTERS/Nacho Doce

A man who works as a miner, carries a baby on a street in La Rinconada, the Andes, Peru, October 5, 2019. REUTERS/Nacho Doce

A miner sits in a shop which buys gold, in La Rinconada, the Andes, Peru, October 4, 2019. REUTERS/Nacho Doce

A miner pulls a cart loaded with his belongings on a street in La Rinconada, the Andes, Peru, October 4, 2019. REUTERS/Nacho Doce

A nurse stitches a head wound of an injured miner who said he was assaulted, at a health centre in La Rinconada, the Andes, Peru, October 4, 2019. REUTERS/Nacho Doce

Homes lived in by miners, stand on a street in La Rinconada, the Andes, Peru, October 10, 2019. REUTERS/Nacho Doce

A miner sharpens a tool on a street in La Rinconada, the Andes, Peru, October 5, 2019. REUTERS/Nacho Doce

Miners are pictured working in La Rinconada, the Andes, Peru, October 5, 2019. REUTERS/Nacho Doce

Miners are pictured working in La Rinconada, the Andes, Peru, October 5, 2019. REUTERS/Nacho Doce

Miners crush rocks that were extracted from a gold mine, in La Rinconada, the Andes, Peru, October 5, 2019. REUTERS/Nacho Doce

A miner drives a truck loaded with stones that were extracted from a gold mine in La Rinconada, the Andes, Peru, October 7, 2019. REUTERS/Nacho Doce

A miner hangs clothes up to dry in La Rinconada, in the Andes, Peru, October 7, 2019. REUTERS/Nacho Doce

The daughter of a miner throws garbage on a trash heap, in front of La Bella Durmiente (The Sleeping Beauty) glacier in La Rinconada, the Andes, Peru, October 10, 2019. REUTERS/Nacho Doce

A miner walks towards public showers on a street in La Rinconada, the Andes, Peru, October 10, 2019. The sign reads: "Hot Showers". REUTERS/Nacho Doce

Miners take a break during a shift at a gold mine in La Rinconada, the Andes, Peru, October 9, 2019. REUTERS/Nacho Doce

A man carrying food for miners walks towards a gold mine in La Rinconada, the Andes, Peru, October 7, 2019. REUTERS/Nacho Doce

Miners walk towards a gold mine in La Rinconada, the Andes, Peru, October 7, 2019. REUTERS/Nacho Doce

A miner poses for a photograph at the entrance of a mine in La Rinconada, the Andes, Peru, October 7, 2019. REUTERS/Nacho Doce

A miner shows a piece gold that was found in a gold mine, to Reuters, in La Rinconada, in the Andes, Peru, October 5, 2019. REUTERS/Nacho Doce

Miners walk along a street in La Rinconada, the Andes, Peru, October 7, 2019. REUTERS/Nacho Doce

A miner crushes rocks that were extracted from a gold mine, in La Rinconada, the Andes, Peru, October 5, 2019. REUTERS/Nacho Doce

A miner fils tubes made from newspaper with dynamite, in a gold mine in La Rinconada, the Andes, Peru, October 10, 2019. REUTERS/Nacho Doce

Clothes are hung up to dry outside a miner's home in La Rinconada, the Andes, Peru, October 11, 2019. REUTERS/Nacho Doce

A man carrying food for miners, walks towards a gold mine in La Rinconada, the Andes, Peru, October 7, 2019. REUTERS/Nacho Doce

A miner poses for a photograph at the entrance of a mine in La Rinconada, the Andes, Peru, October 7, 2019. REUTERS/Nacho Doce

Miners walk towards a gold mine in La Rinconada, the Andes, Peru, October 7, 2019. REUTERS/Nacho Doce

Miners take a break during a shift at a gold mine in La Rinconada, the Andes, Peru, October 9, 2019. REUTERS/Nacho Doce

A miner walks past a church in La Rinconada, the Andes, Peru, October 11, 2019. REUTERS/Nacho Doce

Marco Rose, manager of Germany's first Bundesliga soccer club Borussia Moenchengladbach drinks mineral water during a news conference in Moenchengladbach, Germany, March 10, 2020. Borussia Moenchengladbach and the German soccer league DFL announced that the game against FC Cologne on March 11, will be played without spectators due to the coronavirus. REUTERS/Wolfgang Rattay

Mine workers are seen in front of a banner depicting presidential candidate Jeanine Anez and Samuel Doria Medina for Vice President of "Juntos" party, during protest rally to demand government news rules and laws for their sector in the center of La Paz, Bolivia, March 9, 2020. REUTERS/David Mercado

Independent mine workers attend a protest rally to demand government news rules and laws for their sector in the center of La Paz, Bolivia, March 9, 2020. REUTERS/David Mercado

Independent mine workers attend a protest rally to demand government news rules and laws for their sector in the center of La Paz, Bolivia, March 9, 2020. REUTERS/David Mercado

Independent mine workers attend a protest rally to demand government news rules and laws for their sector in the center of La Paz, Bolivia, March 9, 2020. REUTERS/David Mercado

Independent mine workers attend a protest rally to demand government news rules and laws for their sector in the center of La Paz, Bolivia, March 9, 2020. REUTERS/David Mercado

Independent mine workers attend a protest rally to demand government news rules and laws for their sector in the center of La Paz, Bolivia, March 9, 2020. REUTERS/David Mercado

An independent mine worker carrying a child attends a protest rally to demand government news rules and laws for their sector in the center of La Paz, Bolivia, March 9, 2020. REUTERS/David Mercado

Independent mine workers attend a protest rally to demand government news rules and laws for their sector in the center of La Paz, Bolivia, March 9, 2020. REUTERS/David Mercado

Men who work as miners stand on a large stone called a 'quimbalete' to break down rocks they collected from a gold mine to extract gold, in La Rinconada, the Andes, Peru, October 5, 2019. REUTERS/Nacho Doce SEARCH "WOMEN GOLD PICKERS FEMICIDE" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

Men who work as miners sit together as they take a break inside a gold mine in La Rinconada, the Andes, Peru, October 9, 2019. REUTERS/Nacho Doce SEARCH "WOMEN GOLD PICKERS FEMICIDE" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

A man who is a miner sews a boiler-suit that will be used by other miners, in a tent in La Rinconada, the Andes, Peru, October 10, 2019. REUTERS/Nacho Doce SEARCH "WOMEN GOLD PICKERS FEMICIDE" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES