A steelworker stands at a furnace at the plant of German steel company Salzgitter AG in Salzgitter, Germany March 2, 2020. REUTERS/Fabian Bimmer

Steelworkers stand at a furnace at the plant of German steel company Salzgitter AG in Salzgitter, Germany March 2, 2020. REUTERS/Fabian Bimmer

A steelworker cleans a cylinder at the plant of German steel company Salzgitter AG in Salzgitter, Germany March 2, 2020. REUTERS/Fabian Bimmer TPX IMAGES OF THE DAY

Steelworkers stand at a furnace at the plant of German steel company Salzgitter AG in Salzgitter, Germany March 2, 2020. REUTERS/Fabian Bimmer

A steelworker cleans a cylinder at the plant of German steel company Salzgitter AG in Salzgitter, Germany March 2, 2020. REUTERS/Fabian Bimmer

A steelworker stands at a furnace at the plant of German steel company Salzgitter AG in Salzgitter, Germany March 2, 2020. REUTERS/Fabian Bimmer

A steelworker stands at a furnace at the plant of German steel company Salzgitter AG in Salzgitter, Germany March 2, 2020. REUTERS/Fabian Bimmer

A general view of the SSI Steelworks site in Redcar, Britain February 14, 2020. Picture taken February 14, 2020. REUTERS/Scott Heppell

A general view of the SSI Steelworks site in Redcar, Britain February 14, 2020. Picture taken February 14, 2020. REUTERS/Scott Heppell

A view of the SSI Steelworks site in Redcar, Britain February 14, 2020. Picture taken February 14, 2020. REUTERS/Scott Heppell

A South Tees Development Corporation sign stands at the SSI Steelworks site in Redcar, Britain February 14, 2020. Picture taken February 14, 2020. REUTERS/Scott Heppell

A sign is seen at the SSI Steelworks facility in Redcar, Britain February 14, 2020. Picture taken February 14, 2020. REUTERS/Scott Heppell

A general view of the SSI Steelworks site in Redcar, Britain February 14, 2020. Picture taken February 14, 2020. REUTERS/Scott Heppell

A general view of the SSI Steelworks site in Redcar, Britain February 14, 2020. Picture taken February 14, 2020. REUTERS/Scott Heppell

Bars of steel are seen on a storage shelf at Swiftool Precision Engineering Ltd's facility near Mansfield, Britain, October 30, 2019. Picture taken October 30, 2019. REUTERS/Phil Noble

A United Steelworkers sign is seen in front of the U.S. Steel Great Lakes Works plant in Ecorse, Michigan, U.S., September 24, 2019. Picture taken September 24, 2019. REUTERS/Rebecca Cook

A United Steelworkers flag flies outside the Local 1299 union hall in Ecorse, Michigan, U.S., September 24, 2019. Picture taken September 24, 2019. REUTERS/Rebecca Cook

A "Keep It Made In America" sign is seen in the steelworkers Local 1299 union hall in Ecorse, Michigan, U.S., September 24, 2019. Picture taken September 24, 2019. REUTERS/Rebecca Cook

A "Fighting For Good Jobs" sign is seen in the window of Steelworkers Local 1299 union hall in Ecorse, Michigan, U.S., September 24, 2019. Picture taken September 24, 2019. REUTERS/Rebecca Cook

Boris Johnson, a leadership candidate for Britain's Conservative Party, speaks to a steelworker during his visit in Guisborough, Britain July 5, 2019. Ian Forsyth/Pool via REUTERS

Boris Johnson, a leadership candidate for Britain's Conservative Party, poses for a selfie with a steelworker during his visit in Guisborough, Britain July 5, 2019. Ian Forsyth/Pool via REUTERS

Workers melt metal scraps in the furnace of a steel mill to produce rods in Dhaka, Bangladesh, June 22, 2019. REUTERS/Mohammad Ponir Hossain

John Mohan, 73, who used to work at Redcar's steelworks and voted to leave the EU, walks by fishing huts including his own in South Gare, Redcar, Britain February 27, 2019. "There's no work around here," said Mohan. "No nothing now. They're gonna pull all that down shortly, all the works." REUTERS/Clodagh Kilcoyne SEARCH "KILCOYNE REDCAR " FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

A man plays golf in front of a closed-down steelworks plant in Redcar, Britain February 27, 2019. REUTERS/Clodagh Kilcoyne SEARCH "KILCOYNE REDCAR " FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

A steelworker cleans a steel cylinder at the plant of German steel company Salzgitter AG in Salzgitter, Germany March 5, 2019. REUTERS/Fabian Bimmer

A steelworker cleans a steel cylinder at the plant of German steel company Salzgitter AG in Salzgitter, Germany March 5, 2019. REUTERS/Fabian Bimmer

A steelworker cleans a steel cylinder at the plant of German steel company Salzgitter AG in Salzgitter, Germany March 5, 2019. REUTERS/Fabian Bimmer

A steelworker cleans a steel cylinder at the plant of German steel company Salzgitter AG in Salzgitter, Germany March 5, 2019. REUTERS/Fabian Bimmer

General view of Katowice Steelworks in Dabrowa Gornicza, Poland October 31, 2108. Picture taken October 31, 2018. REUTERS/Kacper Pempel

General view of Katowice Steelworks in Dabrowa Gornicza, Poland October 31, 2108. Picture taken October 31, 2018. REUTERS/Kacper Pempel

Katowice Steelworks is seen in Dabrowa Gornicza, Poland, October 31, 2018. REUTERS/Kacper Pempel SEARCH "NIKISZOWIEC COP" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

French Finance Minister Bruno Le Maire visits the Ascoval steelworks in Saint-Saulve near Valenciennes, France, November 8, 2018. REUTERS/Pascal Rossignol

A worker wears a protective suit near a furnace at the Ascoval steelworks in Saint-Saulve near Valenciennes, France, November 8, 2018. REUTERS/Pascal Rossignol

A steelworker reacts as French Finance Minister Bruno Le Maire (not pictured) visits the Ascoval steelworks in Saint-Saulve near Valenciennes, France, November 8, 2018 REUTERS/Pascal Rossignol

French Finance Minister Bruno Le Maire visits the Ascoval steelworks in Saint-Saulve near Valenciennes, France, November 8, 2018. REUTERS/Pascal Rossignol

A steelworker reacts as French Finance Minister Bruno Le Maire (not pictured) visits the Ascoval steelworks in Saint-Saulve near Valenciennes, France, November 8, 2018. REUTERS/Pascal Rossignol

A steelworker watches the casting of molten metal at the Ascoval steelworks in Saint-Saulve near Valenciennes, France, November 8, 2018 REUTERS/Pascal Rossignol

General view of the Ascoval steelworks in Saint-Saulve near Valenciennes, France, November 8, 2018. REUTERS/Pascal Rossignol

General view of the Ascoval steelworks in Saint-Saulve near Valenciennes, France, November 8, 2018. REUTERS/Pascal Rossignol

A steel worker looks through a protective curtain as French Finance Minister Bruno Le Maire visits the Ascoval steelworks in Saint-Saulve near Valenciennes, France, November 8, 2018 REUTERS/Pascal Rossignol

French Finance Minister Bruno Le Maire replies to journalists after he visited the Ascoval steelworks in Saint-Saulve near Valenciennes, France, November 8, 2018. REUTERS/Pascal Rossignol

General view of the Ascoval steelworks in Saint-Saulve near Valenciennes, France, November 8, 2018. REUTERS/Pascal Rossignol

A worker wears a protective suit near a furnace at the Ascoval steelworks in Saint-Saulve near Valenciennes, France, November 8, 2018. REUTERS/Pascal Rossignol

General view of the Ascoval steelworks in Saint-Saulve near Valenciennes, France, November 8, 2018. REUTERS/Pascal Rossignol

French Finance Minister Bruno Le Maire visits the Ascoval steelworks in Saint-Saulve near Valenciennes, France, November 8, 2018. REUTERS/Pascal Rossignol

French Finance Minister Bruno Le Maire visits the Ascoval steelworks in Saint-Saulve near Valenciennes, France, November 8, 2018. REUTERS/Pascal Rossignol

French Finance Minister Bruno Le Maire visits the Ascoval steelworks in Saint-Saulve near Valenciennes, France, November 8, 2018. REUTERS/Pascal Rossignol

French Finance Minister Bruno Le Maire visits the Ascoval steelworks in Saint-Saulve near Valenciennes, France, November 8, 2018. REUTERS/Pascal Rossignol

Confiscated weapons are destroyed at a foundry in Santiago, Chile, October 19, 2018. REUTERS/Ivan Alvarado

Steelworkers applaud as U.S. President Donald Trump speaks about trade at the Granite City Works steel coil warehouse in Granite City, Illinois, U.S., July 26, 2018. REUTERS/Joshua Roberts

Steelworkers take pictures U.S. President Donald Trump speaks about trade at the Granite City Works steel coil warehouse in Granite City, Illinois, U.S., July 26, 2018. REUTERS/Joshua Roberts

The Tata steelworks are seen in Port Talbot, Wales, June 30, 2018. REUTERS/Rebecca Naden

The Tata steelworks are seen in Port Talbot, Wales, June 30, 2018. REUTERS/Rebecca Naden

The Tata steelworks are seen in Port Talbot, Wales, June 30, 2018. REUTERS/Rebecca Naden

The Tata steelworks are seen in Port Talbot, Wales, June 30, 2018. REUTERS/Rebecca Naden

A road sign points to the Tata steelworks in Port Talbot, Wales, June 30, 2018. REUTERS/Rebecca Naden

A road sign points to the Tata steelworks in Port Talbot, Wales, June 30, 2018. REUTERS/Rebecca Naden

Dave Chrusciel poses at United Steelworkers Local 1899 headquarters in Granite City, Illinois, U.S., May 24, 2018. Photo taken May 24, 2018. REUTERS/Lawrence Bryant

A molten ferroalloy ladle is seen inside Eurasian Resources Group's (ERG) Aksu Ferroalloys Plant in the town of Aksu, north-eastern Kazakhstan, February 19, 2018. Picture taken February 19, 2018. REUTERS/Shamil Zhumatov