6. Finland
One of the cleanest parts of the world can be found in this country, number 6 in our list of countries with the cleanest air in the world in 2018. You may have heard about the Finnish Lapland, which is a place worth to visit. All in all, Finland rates high when we talk about air as the median concentration of PM2.5 is 7, the death rate is 6 per 100,000, and it has the population of 5,523,231.
