© The Financial Times Ltd 2016 FT and 'Financial Times' are trademarks of The Financial Times Ltd.
A man rides an escalator in front of high rise buildings in the financial district Lujiazui in Shanghai
Refugees try to warm themselves with a fire at a refugee camp during a foggy day at the border between Greece and the Former Yugoslav Republic of Macedonia near Idomeni, Greece
Fog hovers beneath Christ the Redeemer statue with the Cantagalo ‘favela’ in the foreground on Monday in Rio de Janeiro, Brazil
An elevation in the city of Sarajevo, Bosnia and Herzegovina, covered in a thick layer of fog, on Monday. Due to high levels of NO2 (nitrogen dioxide) in the air over the city and a certain meteorological condition, residents of Sarajevo were recommended to reduce their movement in the streets and to reduce car traffic
Journalists hover in a cage over fog covered Frankfurt am Main to watch the construction site of the Henninger tower in Frankfurt am Main, central Germany, on Tuesday
A combination photo shows a morning commuter walking in front of the China Central Television (CCTV) building on a smoggy day on December 1, 2015 (top), and on a sunny day on December 2, 2015 (bottom), after a fresh cold front cleared the smog that was blanketing Beijing, China.
A Kashmiri man walks during a foggy morning in Srinagar, Indian controlled Kashmir, on Wednesday. Foggy weather in Kashmir valley affected surface and air traffic causing flight cancellations to and from Srinagar International Airport, stranding hundreds of passengers.
Workers walk past a billboard display showing a scene of Central Business District, as capital city skylines are shrouded with pollutant haze in Beijing, China
A tree stands in the morning fog in Dresden, Germany
A cyclist drives past wafts of mist rising from a tributary of the Weisse Elster river in Leipzig, eastern Germany, on Tuesday
A seagull flies past Westminster Bridge during a foggy day in central London today. Airports across Britain suffered disruption on Monday as heavy fog led to delays and cancellations for a second day. Flights to and from London airports were being affected, while foggy conditions in the capital and across Europe were causing problems to airports around the country.
Motorists ride on a road as thick haze from forest fires shroud the city in Palangkaraya, Central Borneo, Indonesia, Tuesday. The haze has blanketed parts of western Indonesia for about two months and affected neighboring countries like Singapore, Malaysia and Thailand
Chinese tourists walk across a glass-bottomed suspension bridge in the Shinuizhai mountains in Pingjang county, Hunan province some 150 kilometers from Changsha
A general view shows the part of the skyline of Dubai covered in an early morning fog on Monday
Fog covers residential buildings in Qingdao, China. China’s property sales in the first two months of 2015 dropped by the most in three years
People perform morning exercises on a polluted day in Jiaozuo, Henan province, China on Monday.
Students travel via horse and cart surrounded by fog in Jammu, India. As winter sets in, thick fog engulfs most of north India early mornings
Men play cricket in a public park on a foggy morning in Kolkata, India on Friday