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)

People are seen at Avalon Beach on December 18, 2020 in Sydney, Australia. A cluster of Covid-19 cases on the northern beaches of Sydney has grown to 28, prompting NSW health officials to urge residents of affected suburbs to stay home. Traffic at Sydney Airport has increased as people rush to leave the city with several states imposing quarantine restrictions for New South Wales residents. (Photo by Jenny Evans/Getty Images)

People eat sushi off the body of a model at an opening event of a bar in Taiyuan, Shanxi province, August 22, 2015. (Photo by Reuters/Stringer)

(L-R) American actress Alexandra Shipp and American model Paris Jackson attend The Elizabeth Taylor Ball To End AIDS at West Hollywood Park on September 15, 2022 in West Hollywood, California. (Photo by Frazer Harrison/Getty Images)

People stand in front of a black ribbon, symbolising remembrance and mourning, being projected onto the Sydney Opera House on February 9, 2023 in solidarity with Turkey and Syria after a massive earthquake devastated the two countries. (Photo by David Gray/AFP Photo)

In this October 21, 2015, file photo, a young man rides a hoverboard along a Manhattan street toward the Empire State Building in New York. More than 500,000 hoverboards are being recalled after reports that they can burst into flames. The Consumer Product Safety Commission said Wednesday, July 6, 2016, it has received 99 reports of battery packs in the two-wheel motorized scooters catching fire or exploding that causing burns or property damage. The recalled hoverboards were made by eight companies. (Photo by Kathy Willens/AP Photo)

Kate, Princess of Wales and her children Prince George and Princess Charlotte ride in a car behind the coffin of Queen Elizabeth II as it is pulled on a gun carriage through the streets of London following her funeral service at Westminster Abbey, Monday September 19, 2022.The Queen, who died aged 96 on Sept. 8, will be buried at Windsor alongside her late husband, Prince Philip, who died last year. (Photo by Kin Cheung/AP Photo/Pool)

A villager carries wood while a blackbuck runs on a field near Bhetnoi village in Ganjam District, in the Indian eastearn state of Odisha on May 20, 2018. Villagers of Ganjam district due to their traditional religious belief consider blackbucks as incarnations of Lord Vishnu and harbingers of rain. (Photo by Asit Kumar/AFP Photo)