A woman wearing a scarf to cover her face looks on as she waits for a passenger bus on a smoggy morning in New Delhi, India, November 8, 2017. The Great Smog of Delhi is an ongoing severe air-pollution event in New Delhi and adjoining areas in the National Capital Territory of India, in November 2017. Air pollution at this time peaked on both PM 2.5 and PM 10 levels. It has been reported as one of the worst levels of air quality in Delhi since 1999. (Photo by Saumya Khandelwal/Reuters)

A man carries his daughter, dressed as Kumari, on a scooter, as they arrive to attend rituals to celebrate the Navratri Festival, on a road outside the Adyapeath Temple, on the outskirts of Kolkata, India on March 25, 2018. (Photo by Rupak De Chowdhuri/Reuters)

Makeup artist He Yuhong, also known as “Yuya”, checks herself in the mirror during a photo shoot following her transformation into the “Girl with a Pearl Earring”, the 17th century oil painting by Dutch painter Johannes Vermeer, at her house in Chongqing, China on August 14, 2018. (Photo by Thomas Suen/Reuters)

Sudanese protesters rally outside the army complex in Sudan's capital Khartoum on April 18, 2019. Huge crowds of protesters thronged the Sudanese capital Khartoum today, a week after the army's ouster of president Omar al-Bashir, determined to complete their revolution seeking civilian rule. (Photo by Ozan Kose/AFP Photo)

Models present creations by designer Guo Pei as part of her Haute Couture Fall/Winter 2019/20 collection show in Paris, France, July 3, 2019. (Photo by Regis Duvignau/Reuters)

A robin perches on a spade handle in a garden on a rainy day in Lixwm, north Wales. Researchers said this week that when European robins are subjected to human-produced noise, their behaviour changes. (Photo by DGDImages/Alamy Live News)

Argentinian twin dancers Nicolas Filipeli and German Filipeli perform during the Tango Stage final competition at the Tango Dance World Championship in Buenos Aires on August 21, 2019. (Photo by Ronaldo Schemidt/AFP Photo)

Bangladeshi pedestrian cross a broken baily brideg on July 7, 2019 in Sylhet. Heavy vehicle movement was restricted in this bridge but when a cement bag loaded truck got into the bridge, Suddenly, it collapse. (Photo by AFP Photo/Stringer)