Vehicles pass through the heavy fog and air pollution that cover Skopje valley in the early morning, in Skopje, The Former Yugoslav Republic of Macedonia, 14 December 2017. According to media reports, Skopje is considered one of the most polluted cities in the world. (Photo by Georgi Licovski/EPA/EFE)

As an airliner prepares to land, a bird takes off at the Gravelly Point park near Reagan National Airport in Arlington, Va. on December 23, 2018. (Photo by Michael S. Williamson/The Washington Post)

A Lord Krishna devotee is made up before the start of the Festival of Chariots, Ratha-yatra, held by the community of the Krishna Consciousness to honour Jagannatha, the Lord of the Universe, in Budapest, Hungary, Saturday, June 29, 2019. (Photo by Szilard Koszticsak/MTI via AP Photo)

Hundreds of pumpkins lie on a field near Frankfurt, Germany, after sunset on Wednesday, October 16, 2019. The autumn vegetable heralds the approach of halloween. (Photo by Michael Probst/AP Photo)

A member of a feminist group performs during a rally to celebrate International Women's Day in Santiago, Chile, March 8, 2021. (Photo by Ivan Alvarado/Reuters)

In this photograph taken on February 15, 2021, doctor Sergen Saracoglu (L) and nurse Yilzdiz Ayten (C) from the Bahcesaray public hospital vaccination team, arrive at the village of Guneyyamac in eastern Turkey, as part of an expedition to vaccinate residents of 65 years old or above with Sinovac's CoronaVac Covid-19 vaccine. (Photo by Bulent Kilic/AFP Photo)

Models wait backstage before the Heaven Gaia Autumn/Winter 2021 collection show by Xiong Ying during China Fashion Week in Beijing, China on March 25, 2021. (Photo by Tingshu Wang/Reuters)

A woman wears a scuba mask and a surgical mask as a precaution against the spread of the new coronavirus, while buying food in a popular market in Lima, Peru, Monday, March 23, 2020. The vast majority of people recover from the COVID-19 disease. (Photo by Rodrigo Abd/AP Photo)