The Bosnian capital of Sarajevo has been intermittently engulfed in a toxic haze since the start of December, with air quality so bad it was placed first on a list of the world’s most polluted cities for a second straight day Wednesday.
The Swiss air quality technology company IQAir, which compiles a real-time list, on Wednesday put Sarajevo’s air quality index, or AQI, at 301, which is in a “very unhealthy” category, followed by 239 in the Indian city of Kolkata.
