Countries with the worst air #pollution ranked by World Health Organisation
▻http://www.news.com.au/travel/world-travel/countries-with-the-worst-air-pollution-ranked-by-world-health-organisation/story-e6frfqai-1227040198863
The World Health Organization (WHO) released its 2014 report into global air pollution with some concerning finds.
The database looked at the air pollution levels of 1600 cities across 19 countries by using a reading called PM2.5 and PM10. PM2.5 is considered the best indicator of assessing health impacts from air pollution and examines the concentration of fine particulate pollution of 2.5 micrometers or less in diameter (PM2.5).