People walk during a polluted day in Shenyang, Liaoning province, March 31, 2016. (Photo by Reuters/Stringer)

Police in riot gear hold back demonstrators against U.S. Republican presidential candidate Donald Trump outside the Hyatt hotel where Trump is set to speak at the California GOP convention in Burlingame, California, U.S., April 29, 2016. (Photo by Noah Berger/Reuters)

This photo taken on April 16, 2014 shows ethnic Kayan women wearing traditional clothes and bronze rings around tbeir neck in Panpet village, Demoso township in Kayah state, eastern Myanmar. Some ethnic Kayan women, also known as Padaung, begin wearing the bronze rings on their neck and legs from a young age. Usually they start wearing six to ten rings when they are five to ten-years-old and then they put on one more ring a year for years after then. (Photo by Ye Aung Thu/AFP Photo)

A man helps another make his way through deep mud at the site of a landslide at the Koslanda tea plantation near Haldummulla October 30, 2014. Hopes of finding survivors under the mud and rubble of a landslide in south-central Sri Lanka had run out by first light on Thursday, though a government minister cut the estimated death toll to more than 100 from 300 the previous night. (Photo by Dinuka Liyanawatte/Reuters)

A riot policeman punches Greek photojournalist Tatiana Bolari during a demonstration in Athens' Syntagma (Constitution) square October 5, 2011. Police officers attacked several members of the press covering protests, injuring at least two members of the media. (Photo by Yannis Behrakis/Reuters)

A schoolgirl collects rubbish from Karachi's Clifton beach early morning April 22, 2013, during a cleaning campaign as part of the commemoration of Earth Day. (Photo by Akhtar Soomro/Reuters)

People wearing protective face masks amid the coronavirus disease (COVID-19) outbreak are seen near foodstuffs, which are displayed for sale on a car in Omsk, Russia on December 4, 2020. (Photo by Alexey Malgavko/Reuters)

Indian police officers walk wearing virus themed helmet during an awareness drive aimed at preventing the spread of the coronavirus in Hyderabad, India, Wednesday, June 9, 2021. (Photo by Mahesh Kumar A./AP Photo)