An employee works in a copper electrolysis workshop of Kola Mining and Metallurgical Company (Kola MMC), a subsidiary of Nornickel metals and mining company, in the town of Monchegorsk in Murmansk Region, Russia February 25, 2021. REUTERS/Evgenia Novozhenina

An employee works in a copper electrolysis workshop of Kola Mining and Metallurgical Company (Kola MMC), a subsidiary of Nornickel metals and mining company, in the town of Monchegorsk in Murmansk Region, Russia February 25, 2021. REUTERS/Evgenia Novozhenina

Employees work in a copper electrolysis workshop of Kola Mining and Metallurgical Company (Kola MMC), a subsidiary of Nornickel metals and mining company, in the town of Monchegorsk in Murmansk Region, Russia February 25, 2021. REUTERS/Evgenia Novozhenina

Handmade Christmas tree decorations created by Ukrainian artist Maryna Gerashchenko are seen at her home in Kyiv, Ukraine December 9, 2020. The decorations are made by soaking cotton wool in a wheat paste and wrapping it around copper wire. The method was popular among people who could not afford to buy expensive glass Christmas decorations and especially widespread in tsar Russia and Soviet Union. Picture taken December 9, 2020. REUTERS/Gleb Garanich

Ukrainian artist Maryna Gerashchenko, 56, shows handmade Christmas tree decorations to her granddaughter at home in Kyiv, Ukraine December 9, 2020. The decorations are made by soaking cotton wool in a wheat paste and wrapping it around copper wire. The method was popular among people who could not afford to buy expensive glass Christmas decorations and especially widespread in tsar Russia and Soviet Union. Picture taken December 9, 2020. REUTERS/Gleb Garanich

Parts of handmade Christmas tree decorations created by Ukrainian artist Maryna Gerashchenko are seen at her home in Kyiv, Ukraine December 9, 2020. The decorations are made by soaking cotton wool in a wheat paste and wrapping it around copper wire. The method was popular among people who could not afford to buy expensive glass Christmas decorations and especially widespread in tsar Russia and Soviet Union. Picture taken December 9, 2020. REUTERS/Gleb Garanich

Ukrainian artist Maryna Gerashchenko, 56, creates a handmade Christmas tree decoration at home in Kyiv, Ukraine December 9, 2020. The decorations are made by soaking cotton wool in a wheat paste and wrapping it around copper wire. The method was popular among people who could not afford to buy expensive glass Christmas decorations and especially widespread in tsar Russia and Soviet Union. Picture taken December 9, 2020. REUTERS/Gleb Garanich

Ukrainian artist Maryna Gerashchenko, 56, shows handmade Christmas tree decorations at home in Kyiv, Ukraine December 9, 2020. The decorations are made by soaking cotton wool in a wheat paste and wrapping it around copper wire. The method was popular among people who could not afford to buy expensive glass Christmas decorations and especially widespread in tsar Russia and Soviet Union. Picture taken December 9, 2020. REUTERS/Gleb Garanich

Parts of handmade Christmas tree decorations created by Ukrainian artist Maryna Gerashchenko are seen at her home in Kyiv, Ukraine December 9, 2020. The decorations are made by soaking cotton wool in a wheat paste and wrapping it around copper wire. The method was popular among people who could not afford to buy expensive glass Christmas decorations and especially widespread in tsar Russia and Soviet Union. Picture taken December 9, 2020. REUTERS/Gleb Garanich

Ukrainian artist Maryna Gerashchenko, 56, shows handmade Christmas tree decorations at home in Kyiv, Ukraine December 9, 2020. The decorations are made by soaking cotton wool in a wheat paste and wrapping it around copper wire. The method was popular among people who could not afford to buy expensive glass Christmas decorations and especially widespread in tsar Russia and Soviet Union. Picture taken December 9, 2020. REUTERS/Gleb Garanich

Ukrainian artist Maryna Gerashchenko, 56, creates a handmade Christmas tree decoration at home in Kyiv, Ukraine December 9, 2020. The decorations are made by soaking cotton wool in a wheat paste and wrapping it around copper wire. The method was popular among people who could not afford to buy expensive glass Christmas decorations and especially widespread in tsar Russia and Soviet Union. Picture taken December 9, 2020. REUTERS/Gleb Garanich

Handmade Christmas tree decorations created by Ukrainian artist Maryna Gerashchenko are seen at her home in Kyiv, Ukraine December 9, 2020. The decorations are made by soaking cotton wool in a wheat paste and wrapping it around copper wire. The method was popular among people who could not afford to buy expensive glass Christmas decorations and especially widespread in tsar Russia and Soviet Union. Picture taken December 9, 2020. REUTERS/Gleb Garanich

Ukrainian artist Maryna Gerashchenko, 56, paints a handmade Christmas tree decoration at home in Kyiv, Ukraine December 9, 2020. The decorations are made by soaking cotton wool in a wheat paste and wrapping it around copper wire. The method was popular among people who could not afford to buy expensive glass Christmas decorations and especially widespread in tsar Russia and Soviet Union. Picture taken December 9, 2020. REUTERS/Gleb Garanich

A staff member cleans a copper beer vat at the Harbwr Brewery, as new lockdown restrictions in Wales taking place from 1800 hours today, as the coronavirus disease (COVID-19) outbreak continues in Tenby, Wales, Britain December 4, 2020. REUTERS/Rebecca Naden

A staff member cleans a copper beer vat at the Harbwr Brewery, as new lockdown restrictions in Wales taking place from 1800 hours today, as the coronavirus disease (COVID-19) outbreak continues in Tenby, Wales, Britain December 4, 2020. REUTERS/Rebecca Naden

A staff member cleans a copper beer vat at the Harbwr Brewery, as new lockdown restrictions in Wales taking place from 1800 hours today, as the coronavirus disease (COVID-19) outbreak continues in Tenby, Wales, Britain December 4, 2020. REUTERS/Rebecca Naden

A vendor works on a copper item to be sold in a shop in Baghdad's al-Safafeer Souq bazaar,Iraq October 16, 2020. REUTERS/Thaier Al-Sudani

A vendor works on a copper item to be sold in a shop in Baghdad's al-Safafeer Souq bazaar,Iraq October 16, 2020. REUTERS/Thaier Al-Sudani

The company's first electric pickup truck is seen inside the Codelco El Teniente copper mine, the world's largest underground copper mine during an industry tour group near Machali area, Rancagua, Chile October 15, 2020. REUTERS/Fabian Cambero

Chile's Minister of Mining Baldo Prokurica talks to the media inside the Codelco El Teniente copper mine, the world's largest underground copper mine during an industry tour group near Machali area, Rancagua, Chile October 15, 2020. REUTERS/Fabian Cambero

A mining truck is seen during an industry tour group inside the Codelco El Teniente copper mine, the world's largest underground copper mine near Machali area, Rancagua, Chile October 15, 2020. REUTERS/Fabian Cambero

A truck loaded with ore is seen in a mill inside the Codelco El Teniente copper mine, the world's largest underground copper mine during an industry tour group near Machali area, Rancagua, Chile October 15, 2020. REUTERS/Fabian Cambero

A mining truck is seen during an industry tour group inside the Codelco El Teniente copper mine, the world's largest underground copper mine near Machali area, Rancagua, Chile October 15, 2020. REUTERS/Fabian Cambero

An industry tour group walks inside the Codelco El Teniente copper mine, the world's largest underground copper mine near Machali area, Rancagua, Chile October 15, 2020. REUTERS/Fabian Cambero

An industry tour group walks inside the Codelco El Teniente copper mine, the world's largest underground copper mine near Machali area, Rancagua, Chile October 15, 2020. REUTERS/Fabian Cambero

Mario Sepulveda, one of the 33 Chilean miners who were trapped for 69 days underground in a copper and gold mine, poses for a picture, next to a fire extinguisher with shape of the 'capsule' that was used to rescue them, during a Reuters interview to commemorate the 10th rescue anniversary from the San Jose mine at the Atacama desert near Copiapo area, in Santiago, Chile October 12, 2020. Picture taken October 12, 2020. REUTERS/Jorge Vega

Mario Sepulveda, one of the 33 Chilean miners who were trapped for 69 days underground in a copper and gold mine, poses for a picture during a Reuters interview to commemorate the 10th rescue anniversary from the San Jose mine at the Atacama desert near Copiapo area, in Santiago, Chile October 12, 2020. Picture taken October 12, 2020. REUTERS/Jorge Vega

The Codelco El Teniente copper mine, the world's largest underground copper mine is shown near Rancagua, Chile August 13, 2020. Picture taken August 13, 2020. Picture taken through a window. REUTERS/Fabian Cambero

The Codelco El Teniente copper mine, the world's largest underground copper mine is shown near Rancagua, Chile August 13, 2020. Picture taken August 13, 2020. REUTERS/Fabian Cambero

An industry tour group walk inside the Codelco El Teniente copper mine, the world's largest underground copper mine near Rancagua, Chile August 13, 2020. Picture taken August 13, 2020. REUTERS/Fabian Cambero

Minister of Mining of Chile Baldo Prokurica and an industry tour group walk inside the Codelco El Teniente copper mine, the world's largest underground copper mine near Rancagua, Chile August 13, 2020. Picture taken August 13, 2020. REUTERS/Fabian Cambero

The Codelco El Teniente copper mine, the world's largest underground copper mine is shown near Rancagua, Chile August 13, 2020. Picture taken August 13, 2020. Picture taken through a window. REUTERS/Fabian Cambero

Anwer Ibrahim, 62, works at copper workshop at al-Ghoreya district, following the outbreak of the coronavirus disease (COVID-19), in old Cairo, Egypt July 26, 2020. Picture taken July 26, 2020. REUTERS/Amr Abdallah Dalsh

Horse Racing - Royal Ascot - Ascot Racecourse, Ascot, Britain - June 17, 2020 Fujaira Prince ridden by Andrea Atzeni wins the Copper Horse Handicap Stakes, as racing resumed behind closed doors after the outbreak of the coronavirus disease (COVID-19) Alan Crowhurst/Pool via REUTERS

Detail of a model of the antiviral mask with copper, NanoHack, for 3D printers, in the Center of Innovation and Advanced Design, during a preventive quarantine after the outbreak of the coronavirus disease (COVID-19), in Santiago, Chile, April 1, 2020. REUTERS/Pablo Sanhueza

Daniel Martinez, technical director of Copper3D, poses with the NanoHack mask, for a portrait at the Center for Innovation and Advanced Design, during a preventive quarantine after the outbreak of coronavirus disease (COVID-19), in Santiago, Chile, April 1, 2020. REUTERS/Pablo Sanhueza

Detail of the antiviral mask with copper, NanoHack, printed in 3D, in the Center of Innovation and Advanced Design, during a preventive quarantine after the outbreak of the coronavirus disease (COVID-19), in Santiago, Chile, April 1, 2020. REUTERS/Pablo Sanhueza

Boxing - Sam Noakes v Daryl Pearce - Copper Box Arena, London, Britain - December 21, 2019 Sam Noakes in action against Daryl Pearce Action Images via Reuters/Peter Cziborra

Boxing - Sam Noakes v Daryl Pearce - Copper Box Arena, London, Britain - December 21, 2019 Sam Noakes in action against Daryl Pearce Action Images via Reuters/Peter Cziborra

Boxing - Denzel Bentley v Adam Grabiec - Copper Box Arena, London, Britain - December 21, 2019 Denzel Bentley in action against Adam Grabiec Action Images via Reuters/Peter Cziborra

Boxing - Denzel Bentley v Adam Grabiec - Copper Box Arena, London, Britain - December 21, 2019 Denzel Bentley in action against Adam Grabiec Action Images via Reuters/Peter Cziborra

Boxing - Troy Williamson v Dario Socci - Copper Box Arena, London, Britain - December 21, 2019 Troy Williamson in action against Dario Socci Action Images via Reuters/Peter Cziborra

Boxing - Troy Williamson v Dario Socci - Copper Box Arena, London, Britain - December 21, 2019 Troy Williamson in action against Dario Socci Action Images via Reuters/Peter Cziborra

Boxing - Denzel Bentley v Adam Grabiec - Copper Box Arena, London, Britain - December 21, 2019 Denzel Bentley celebrates his win against Adam Grabiec Action Images via Reuters/Peter Cziborra

Boxing - Troy Williamson v Dario Socci - Copper Box Arena, London, Britain - December 21, 2019 Troy Williamson celebrates his win against Dario Socci Action Images via Reuters/Peter Cziborra

Boxing - Troy Williamson v Dario Socci - Copper Box Arena, London, Britain - December 21, 2019 Troy Williamson in action against Dario Socci Action Images via Reuters/Peter Cziborra

Boxing - Sunny Edwards v Marcel Braithwaite - Copper Box Arena, London, Britain - December 21, 2019 Sunny Edwards in action against Marcel Braithwaite Action Images via Reuters/Peter Cziborra

Boxing - Troy Williamson v Dario Socci - Copper Box Arena, London, Britain - December 21, 2019 Dario Socci appeals to the referee Action Images via Reuters/Peter Cziborra

Boxing - Denzel Bentley v Adam Grabiec - Copper Box Arena, London, Britain - December 21, 2019 Denzel Bentley in action against Adam Grabiec Action Images via Reuters/Peter Cziborra

Boxing - Troy Williamson v Dario Socci - Copper Box Arena, London, Britain - December 21, 2019 Troy Williamson celebrates his win against Dario Socci Action Images via Reuters/Peter Cziborra

Boxing - Troy Williamson v Dario Socci - Copper Box Arena, London, Britain - December 21, 2019 Troy Williamson in action against Dario Socci Action Images via Reuters/Peter Cziborra

Boxing - Troy Williamson v Dario Socci - Copper Box Arena, London, Britain - December 21, 2019 Troy Williamson after knocking down Dario Socci Action Images via Reuters/Peter Cziborra

Boxing - Denzel Bentley v Adam Grabiec - Copper Box Arena, London, Britain - December 21, 2019 Denzel Bentley celebrates his win against Adam Grabiec Action Images via Reuters/Peter Cziborra

Boxing - Sam Noakes v Daryl Pearce - Copper Box Arena, London, Britain - December 21, 2019 Sam Noakes celebrates his win against Daryl Pearce Action Images via Reuters/Peter Cziborra

Boxing - Troy Williamson v Dario Socci - Copper Box Arena, London, Britain - December 21, 2019 Troy Williamson celebrates his win against Dario Socci Action Images via Reuters/Peter Cziborra

Boxing - Troy Williamson v Dario Socci - Copper Box Arena, London, Britain - December 21, 2019 Troy Williamson in action against Dario Socci Action Images via Reuters/Peter Cziborra

Boxing - Troy Williamson v Dario Socci - Copper Box Arena, London, Britain - December 21, 2019 Troy Williamson in action against Dario Socci Action Images via Reuters/Peter Cziborra

Boxing - Sunny Edwards v Marcel Braithwaite - Copper Box Arena, London, Britain - December 21, 2019 Sunny Edwards in action against Marcel Braithwaite Action Images via Reuters/Peter Cziborra