Which cities in the world are the most polluted? That depends on who you ask, and what exactly you are looking for. Some of the data is from the 2016 WHO (World Health Organization) report. Air quality data from 3,000 cities worldwide was used to create a list of urban areas most affected by air pollution. But air pollution is only one part of the puzzle when it comes to environmental contamination.
Read more at: http://www.therichest.com/shocking/15-photos-of-the-most-polluted-cities-in-the-world/