A steel worker of ThyssenKrupp stands amid sparks of raw iron coming from a blast furnace at a ThyssenKrupp steel factory in Duisburg, western Germany, January 30, 2020. REUTERS/Wolfgang Rattay 

A steel worker of ThyssenKrupp stands amid sparks of raw iron coming from a blast furnace at a ThyssenKrupp steel factory in Duisburg, western Germany, January 30, 2020. REUTERS/Wolfgang Rattay 

A steel worker of ThyssenKrupp stands amid sparks of raw iron coming from a blast furnace at a ThyssenKrupp steel factory in Duisburg, western Germany, January 30, 2020. REUTERS/Wolfgang Rattay 

Smoke billows from a firework after it was lit on the rooftop of a residential building during Diwali, the festival of lights, celebrations in New Delhi, India, October 27, 2019. REUTERS/Altaf Hussain 

Fireworks explode over the Kremlin during the "Spasskaya Tower" international military music festival on Red Square in Moscow, Russia August 23, 2019. REUTERS/Evgenia Novozhenina 

A part of a turbine is seen before the visit of German Chancellor Angela Merkel at Siemens plant in Goerlitz, Germany, July 15, 2019. REUTERS/Hannibal Hanschke 

A panoramic view of the city of Santiago, Chile June 6, 2019. REUTERS/Rodrigo Garrido 

Christmas decorations hang from trees in a forest near Birnam, Scotland, Britain, December 16, 2018. REUTERS/Russell Cheyne 

Christmas decorations hang from trees in a forest near Birnam, Scotland, Britain, December 16, 2018. REUTERS/Russell Cheyne 

A Christmas decoration hangs from a tree in a forest near Birnam, Scotland, Britain, December 16, 2018. REUTERS/Russell Cheyne 

Christmas decorations are displayed at a shop during the traditional Christkindelsmaerik (Christ Child market) near Strasbourg Cathedral, France, November 24, 2018. REUTERS/Vincent Kessler 

Coffee fruits are seen at a coffee plantation in Chinchina, Colombia November 22, 2018. REUTERS/Luisa Gonzalez 

A general view shows Fuego volcano (Volcano of Fire) erupting as seen from San Juan Alotenango, outside of Guatemala City, Guatemala November 19, 2018. REUTERS/Luis Echeverria 

Two one kilogram weights are seen on a vintage scale in Saussay-la-Campagne, western France, November 15, 2018. REUTERS/Christian Hartmann 

A one kilogram weight is seen in Saussay-la-Campagne, western France, November 15, 2018. REUTERS/Christian Hartmann 

A one and two kilogram weights are seen in Saussay-la-Campagne, western France, November 15, 2018. REUTERS/Christian Hartmann 

A one kilogram weight is seen in Saussay-la-Campagne, western France, November 15, 2018. REUTERS/Christian Hartmann 

Two one kilogram weights are seen on a vintage scale in Saussay-la-Campagne, western France, November 15, 2018. REUTERS/Christian Hartmann 

A metal marker on the road defines the border line between Mexico and the United States at the San Ysidro border in San Diego, California, U.S. November 9, 2018. REUTERS/Mike Blake 

A metal marker on the road defines the border line between Mexico and the United States at the San Ysidro border in San Diego, California, U.S. November 9, 2018. REUTERS/Mike Blake 

Fish on display in a fish market at the Fisherman's Wharf in La Libertad, El Salvador November 8, 2018. REUTERS/Jose Cabezas 

Fish are seen at the fish market at Fisherman's Wharf in La Libertad, El Salvador, November 8, 2018. REUTERS/Jose Cabezas 

A worker manufactures aluminium cooking equipment in a workshop in Cairo, Egypt, November 8, 2018. REUTERS/Mohamed Abd El Ghany 

Fish are seen at the fish market along Fisherman's Wharf in La Libertad, El Salvador, November 8, 2018. REUTERS/Jose Cabezas 

Fish are seen at the fish market along Fisherman's Wharf in La Libertad, El Salvador, November 8, 2018. REUTERS/Jose Cabezas 

Fish are displayed at the fish market along Fisherman's Wharf in La Libertad, El Salvador, November 8, 2018. REUTERS/Jose Cabezas 

Sunlight reflects from windows of an apartment building on a foggy autumn day in Kiev, Ukraine November 8, 2018. REUTERS/Valentyn Ogirenko TPX IMAGES OF THE DAY 

Sunlight reflects from windows of an apartment building on a foggy autumn day in Kiev, Ukraine November 8, 2018. REUTERS/Valentyn Ogirenko TPX IMAGES OF THE DAY 

Sunlight reflects from windows of an apartment building on a foggy autumn day in Kiev, Ukraine November 8, 2018. REUTERS/Valentyn Ogirenko TPX IMAGES OF THE DAY 

Stainless steel tubes are stored ready to be made into exhausts at the Eminox factory, during a post-Budget visit by Britain's Chancellor of the Exchequer Philip Hammond, in Gainsborough, Britain October 30, 2018. Christopher Furlong/Pool via REUTERS 

Automotive components are seen at the Muller manufacturing facility in Redditch, Britain August 28, 2018. Picture taken August 28, 2018. TO MATCH INSIGHT BRITAIN-ECONOMY/AUTOMATION REUTERS/Darren Staples 

The coil tubing drum which is used to carry water into the well is see at the site where shale gas developer Cuadrilla Resources will start fracking for gas next week at its Preston New Road site near Blackpool, Britain October 5, 2018. REUTERS/Peter Powell 

The coil tubing drum which is used to carry water into the well is see at the site where shale gas developer Cuadrilla Resources will start fracking for gas next week at its Preston New Road site near Blackpool, Britain October 5, 2018. REUTERS/Peter Powell 

A vendor sells a key chain with the name Macedonia on it, in Skopje, Macedonia September 27, 2018. REUTERS/Ognen Teofilovski 

A boat sails on Lake Leman on a windy autumn day near Puidoux, Switzerland September 25, 2018. REUTERS/Denis Balibouse TPX IMAGES OF THE DAY 

Palestinian demonstrators use slings to hurl stones at Israeli troops during a protest against Israeli land seizures for Jewish settlements, in the village of Ras Karkar, near Ramallah in the occupied West Bank September 4, 2018. REUTERS/Mohamad Torokman TPX IMAGES OF THE DAY 

A Palestinian demonstrator uses a sling to hurl stones at Israeli troops during a protest against Israeli land seizures for Jewish settlements, in the village of Ras Karkar, near Ramallah in the occupied West Bank September 4, 2018. REUTERS/Mohamad Torokman 

Palestinian demonstrators use slings to hurl stones at Israeli troops during a protest against Israeli land seizures for Jewish settlements, in the village of Ras Karkar, near Ramallah in the occupied West Bank September 4, 2018. REUTERS/Mohamad Torokman 

Visitors walk through a man-made ice cave inside the Mer de Glace valley glacier, one of the largest in the Alps despite large substantial melting in recent decades, in Chamonix, France, August 30, 2018. Picture taken on August 30. REUTERS/Toby Melville TPX IMAGES OF THE DAY 

Visitors walk through a man-made ice cave inside the Mer de Glace valley glacier, one of the largest in the Alps despite large substantial melting in recent decades, in Chamonix, France, August 30, 2018. Picture taken on August 30. REUTERS/Toby Melville 

Revellers play with fireworks during the annual "Corda" festival in the village of Paterna near Valencia, Spain, August 27, 2018. REUTERS/Heino Kalis 

Revellers play with fireworks during the annual "Corda" festival in the village of Paterna near Valencia, Spain, August 27, 2018. REUTERS/Heino Kalis 

Revellers play with fireworks during the annual "Corda" festival in the village of Paterna near Valencia, Spain, August 27, 2018. REUTERS/Heino Kalis 

A reveller plays with fireworks during the annual "Corda" festival in the village of Paterna near Valencia, Spain, August 27, 2018. REUTERS/Heino Kalis 

Revellers play with fireworks during the annual "Corda" festival in the village of Paterna near Valencia, Spain, August 27, 2018. REUTERS/Heino Kalis 

Revellers play with fireworks during the annual "Corda" festival in the village of Paterna near Valencia, Spain, August 27, 2018. REUTERS/Heino Kalis 

Revellers play with fireworks during the annual "Corda" festival in the village of Paterna near Valencia, Spain, August 27, 2018. REUTERS/Heino Kalis 

A sign displaying price of peppers is seen at a stall in a municipal market in Caracas, Venezuela August 21, 2018. REUTERS/Marco Bello 

Utensils are pictured at a factory for household items in Capiata, Paraguay July 31, 2018. REUTERS/Jorge Adorno 

Aluminium utensils are pictured at a factory for household items in Capiata, Paraguay July 31, 2018. REUTERS/Jorge Adorno 

Aluminium utensils are pictured at a factory for household items in Capiata, Paraguay July 31, 2018. REUTERS/Jorge Adorno 

Aluminium utensils are pictured at a factory for household items in Capiata, Paraguay July 31, 2018. REUTERS/Jorge Adorno 

An aluminium utensil is pictured at a factory for household items in Capiata, Paraguay July 31, 2018. REUTERS/Jorge Adorno 

Aluminium utensils are pictured at a factory for household items in Capiata, Paraguay July 31, 2018. REUTERS/Jorge Adorno 

Aluminium utensils are pictured at a factory for household items in Capiata, Paraguay August 1, 2018. REUTERS/Jorge Adorno 

Aluminium is pictured at a factory for household items in Capiata, Paraguay August 1, 2018. REUTERS/Jorge Adorno 

An employee of a factory for household items works with aluminium utensils at a factory for household items in Capiata, Paraguay July 31, 2018. REUTERS/Jorge Adorno 

A factory for household items is pictured during a production with aluminium, in Capiata, Paraguay August 1, 2018. REUTERS/Jorge Adorno 

Aluminium utensils are pictured at a factory for household items in Capiata, Paraguay July 31, 2018. REUTERS/Jorge Adorno 

A cat is pictured beside aluminium utensils at a factory for household items in Capiata, Paraguay August 1, 2018. REUTERS/Jorge Adorno