Foggy

A man rides an escalator in front of hig...A man rides an escalator in front of high rise buildings in the financial district Lujiazui in Shanghai on April 6, 2016.  / AFP PHOTO / JOHANNES EISELEJOHANNES EISELE/AFP/Getty Images

Johannes Eiseke/AFP

A man rides an escalator in front of high rise buildings in the financial district Lujiazui in Shanghai  

Buildings under construction are seen during a hazy day in Rizhao...Buildings under construction are seen during a hazy day in Rizhao, Shandong Province, China, March 15, 2016. REUTERS/Stringer ATTENTION EDITORS - THIS PICTURE WAS PROVIDED BY A THIRD PARTY. THIS PICTURE IS DISTRIBUTED EXACTLY AS RECEIVED BY REUTERS, AS A SERVICE TO CLIENTS. CHINA OUT. NO COMMERCIAL OR EDITORIAL SALES IN CHINA.       TPX IMAGES OF THE DAY

Reuters

Buildings under construction are seen during a hazy day in Rizhao, Shandong Province, China 

Still thousands of refugees massing in Idomeni to enter Macedonia...epa05205764 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 (FYROM), near Idomeni, northern Greece, 11 March 2016. Greece has registered in its territory some 36,000 migrants trapped due to entry restrictions already imposed by Macedonia in recent months, by denying entry to all those who are considered economic migrants, prohibiting the passage of Afghans, and finally denying entry to all Syrians and Iraqis who are not from combat areas.  EPA/YANNIS KOLESIDIS

Yannis Kolesidis/EPA

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 

Feature Sunrise Lights...epa04761495 Sunrise lights up by the foggy landscape in Reitwein, (Brandenburg), Germany, early morning 22 May 2015.  EPA/PATRICK PLEUL

Patrick Pleul/EPA

Sunrise in Reitwein, (Brandenburg), Germany 

A security personnel is silhouetted against the headlights of a car as he stands guard during the rehearsal of Republic Day parade on a foggy winter morning in New Delhi...A security personnel is silhouetted against the headlights of a car as he stands guard during the rehearsal of Republic Day parade on a foggy winter morning in New Delhi January 8, 2015. India will celebrate its annual Republic Day on January 26. REUTERS/Adnan Abidi (INDIA - Tags: MILITARY POLITICS SOCIETY ENVIRONMENT)

Adnan Abidi/Reuters

A security personnel is silhouetted against the headlights of a car as he stands guard during the rehearsal of Republic Day parade on a foggy winter morning in New Delhi. India will celebrate its annual Republic Day on January 26. 

Villagers walk home carrying water collected from the Kuakhai River in on a foggy morning in Bhubaneswar, India, Thursday, Dec. 19, 2013.

Biswaranjan Rout/AP

Villagers walk home carrying water collected from the Kuakhai River on a foggy morning in Bhubaneswar, India 

A Pakistani balloon vendor walks through...A Pakistani balloon vendor walks through a cold and foggy morning in Lahore on December 17, 2013. Ongoing foggy weather in Punjab and other parts of the country has badly affected flight and rail schedules. TOPSHOTS  AFP PHOTO/ARIF ALIArif Ali/AFP/Getty Images

Arif Ali/AFP

A balloon vendor walks through a cold and foggy morning in Lahore, Pakistan. Fog in Punjab and other parts of the country has badly affected flight and rail schedules