A fan of K-pop idol boy band BTS poses for photographs with cut-out of BTS at a pop-up store selling BTS goods in Seoul, South Korea, December 24, 2019. (Photo by Kim Hong-Ji/Reuters)

Protesters wear gas masks in the front of the Romanian Environment Ministry in Bucharest March 4, 2019, to demand better air. Dozens of people holding placards reading “Our children don't breath air anymore” gather in the front of the Environment Ministry to ask for better breathable air in Bucharest. (Photo by Daniel Mihailescu/AFP Photo)

A boy plays with a toy plane on the eve of a solar eclipse, in La Higuera, Coquimbo Region, in the Atacama desert about 580 km north of Santiago, on July 1, 2019. A total solar eclipse will be visible from small parts of Chile and Argentina on July 2. (Photo by Martin Bernetti/AFP Photo)

Bella Hadid and Gigi Hadid prepares backstage for Savage X Fenty Show Presented By Amazon Prime Video – Backstage at Barclays Center on September 10, 2019 in Brooklyn, New York. (Photo by Ilya S. Savenok/Getty Images for Savage X Fenty Show Presented by Amazon Prime Video)

A leg of a “diablito” frog (Oophaga sylvatica) is photographed in a laboratory at a laboratory in the zoo of Cali, Colombia, on July 19, 2019. Colombia is the second country with the largest number of amphibians in the world after Brazil. More than 40% of amphibian species worldwide are in danger of extinction. (Photo by Luis Robayo/AFP Photo)

In this April 3, 2019, photo, horses from Nepal cavalry rest in a stable after morning practice for Ghode Jatra festival in Kathmandu, Nepal. The “Ghode Jatra” is an annual horse festival celebrated on the Nepal Cavalry grounds in Kathmandu, which marks the defeat of a Hindu demon. (Photo by Niranjan Shrestha/AP Photo)

Paolo Guerrero of Brazil's Internacional reacts after missing an opportunity to score during a Copa Libertadores soccer match against Chile's Palestino in Porto Alegre, Brazil, Tuesday, April 9, 2019. (Photo by Diego Vara/Reuters)

Flames rise from Notre Dame cathedral as it burns in Paris, Monday, April 15, 2019. Massive plumes of yellow brown smoke is filling the air above Notre Dame Cathedral and ash is falling on tourists and others around the island that marks the center of Paris. (Photo by Thibault Camus/AP Photo)