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)

Laura and Chris Marriott pose during a press photo call with their winning carrot at 3.8kg and Beetroot at 17.840kg following judging for the giant vegetable competition at the Harrogate Autumn Flower Show on September 13, 2019 in Harrogate, England. (Photo by Ian Forsyth/Getty Images)

A frosty sunset is seen through icicles in Peremilovo village, 65 km (40,6 miles) north of Moscow, Russia, Sunday, December 16, 2018. Temperatures in the Moscow region on Sunday dropped to –12 degree Celsius (10 Fahrenheit). (Photo by Alexander Zemlianichenko/AP Photo)

Firefighters and volunteers work to extinguish a wildfire in Krieza, on Evia Island, Greece, on Tuesday, July 30, 2024. A strong wind in the Aegean Sea is increasing wildfire risks, while parts of the mainland will see heat of 43C by the end of the week. (Photo by Nick Paleologos/Bloomberg)

A child explores the ancestry in the stars exhibit that forms part of YOU:MATTER, after the cutting-edge experience opened at the National Science and Media Museum in Bradford, UK on Friday, April 11, 2025. (Photo by Danny Lawson/PA Images via Getty Images)

The “EMIEW3” robot (R) demonstrates communicating with a visitor during a press preview in Tokyo on April 8, 2016. Japanese electronics giant Hitachi unveiled its humanoid customer service and guidance robot “EMIEW3” and “remote brain” robotics IT platform. (Photo by Toshifumi Kitamura/AFP Photo)

A mother and her daughter shop for bananas at a market in Bangkok, Thailand, March 31, 2016. (Photo by Athit Perawongmetha/Reuters)

The summit of one of Europe's tallest mountains glows like the flame of a candle as the sun rises on a clear morning. The Matterhorn, famous for appearing on bars of Toblerone chocolate bars, reflects the vivid orange light at 5.37am. (Photo by Margarethe Jaeger/Solent News & Photo Agency)