11 Worst Countries for Air Pollution

10. Iran

Average PM2.5 pollution: 76 ug/m3

Average PM10 pollution: 127 ug/m3

Iran is one of the larger countries in the world, ranking 18^th as far as area goes and 17^th by population, with an estimated 78 million people. High traffic volumes, a growing industry sector and poor government management have made Iran the tenth worst country in the world by air pollution. One city ended up on the list with the highest PM10 levels, and one on the list with the highest PM2.5 levels. It’s a pretty grim situation, but hopefully, things will get back on track in the near future.