Sarajevo is nowhere to be seen, …as the capital of Bosnia has been covered in thick smog and air pollution in recent days.
The local government has issued a warning to residents to avoid outdoor activities …and measuring stations around the city have recorded extremely dangerous levels of pollution.
The city's geographical circumstances make it one of the most polluted cities in the world, …and the lack of regulation among industrial polluters, households and old vehicles also contribute to the problem.
"State officials have to deal with this issue. If we can't have healthy air - then how could we have healthy life?"
Face masks have become a must for residents when heading outside.
"I mean it's enough just to take a look around and you can see how polluted it is. All of my clothes stink when I come back home."
In Sydney, the city's iconic Opera House and Harbour Bridge have disappeared behind a smoky haze, …as wildfires across New South Wales sent smoke across the east and over the Pacific.
According to government data, Sydney's air quality index readings on Tuesday were over ten times the threshold considered hazardous.
Sydney has been covered in smoke and ash for more than two weeks, …and while bushfires are common during Australia's hot, dry summers, …experts say climate change has left bushland tinder-dry.
Park Se-young, Arirang News.