People in Kathmandu joke that the face mask has now become part of the national dress – an indispensable accessory in an effort to protect themselves from the dust. Nepal has the worst air quality in the world, according to the Environmental Performance Index. (Photo by Pete Pattisson/The Guardian)

Residents wearing facemasks as a preventive measure against the spread of the COVID-19 coronavirus sit in a passenger pick-up on a street in Rawalpindi on March 13, 2020. (Photo by Aamir Qureshi/AFP Photo)

Clowns pose for a picture during the International Clown Day in Guadalajara, Mexico, on December 10, 2019. (Photo by Ulises Ruiz/AFP Photo)

A Kenyan police officer calls for reinforcement in front of a lorry set on fire by protesters during riots in the informal settlement of Kibera in Nairobia on May 2, 2023. Kenyan riot police were out on the streets on May 2, 2023 as the opposition defied a police ban and staged new demonstrations over the cost of living crisis and last year's election results. (Photo by Luis Tato/AFP Photo)

Alejandra Guajardo, Miss Universe El Salvador 2022 poses on stage in an outfit inspired by the country's use of Bitcoin, and previously the colón and cocoa beans as a currency, during the 71st Miss Universe National Costume Show at the Ernst N. Morial Convention Center in New Orleans, Louisiana, U.S. January 11, 2023. (Photo by Benjamin Askinas/©IMG Universe LLC/Handout via Reuters)

US M142 High Mobility Artillery Rocket System (HIMARS) is launched as journalists film during a military exercise in Capas, Tarlac province, Philippines, 13 October 2022. The Philippines hosted simultaneous combat drills with the United States, South Korea, and Japan to improve interoperability in times of conflict. (Photo by Francis R. Malasig/EPA/EFE)

Thailand's Lac Somruedee Pruepruk balances the ball during the sepak takraw women's match against Malaysia at the 31st Southeast Asian Games (SEA Games) in Hanoi on May 17, 2022. (Photo by Ye Aung Thu/AFP Photo)

“The Glimmer Twins”, a statue of Rolling Stones Sir Mick Jagger and Keith Richards created by sculptor Amy Goodman (centre), is unveiled at One Bell Corner in Dartford, Essex, UK on Wednesday, August 9, 2023. The statue has been commissioned by Dartford Borough Council to celebrate two of the town's most famous former residents. (Photo by Yui Mok/PA Images via Getty Images)