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Pigeons fly near a mosque on a foggy morning in Duzce, Turkey on February 18, 2020. Visibility dropped to 25 meters in some parts of the city with a temperature of 2 degrees Celsius.(Photo/IC)
![](http://www.ecns.cn/hd/2020/02/19/2624c775de2f415bbb521234c4b1c079.jpg)
A man crosses a bridge on a foggy morning in Duzce, Turkey on February 18, 2020. Visibility dropped to 25 meters in some parts of the city with a temperature of 2 degrees Celsius.(Photo/IC)
![](http://www.ecns.cn/hd/2020/02/19/fe8b28369a2f406095449fa990a5a3a1.jpg)
A man walks amid leafless trees on a foggy morning in Duzce, Turkey on February 18, 2020. Visibility dropped to 25 meters in some parts of the city with a temperature of 2 degrees Celsius.(Photo/IC)