Global air pollution levels (2013 - 2014)
All levels are based on an average of the top 10 most polluted cities in each country. India is by far the worst with 134 fine particle matter 2.5[ug/m] and Sweden had the lowest levels at 7.2. Most of the data were collected in 2013 and 2014 with a few countries only having data available from 2009. Other countries, especially in Africa, did not have any data.