PM2.5 air pollution, mean annual exposure (micrograms per cubic meter)
| 1990 | 2000 | 2005 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 |
| 中国 | 49.30 | 50.30 | 51.48 | 47.48 | 51.35 | 48.12 | 58.47 | 54.57 | 50.83 | 46.83 | 45.84 | 40.27 | 37.55 | 34.81 |
| ロシア連邦 | 25.93 | 20.75 | 15.80 | 15.38 | 13.91 | 13.90 | 14.06 | 14.25 | 12.94 | 12.48 | 11.74 | 12.32 | 11.68 | 11.27 |
| ブラジル | 15.36 | 15.57 | 15.36 | 14.93 | 15.54 | 14.60 | 13.89 | 13.79 | 12.40 | 12.11 | 12.22 | 12.25 | 12.35 | 12.18 |
| インド | 62.00 | 61.51 | 62.77 | 50.10 | 61.71 | 74.00 | 76.25 | 79.04 | 73.81 | 75.79 | 67.31 | 68.12 | 59.89 | 48.39 |
| 南アフリカ | 24.57 | 24.36 | 22.50 | 24.86 | 25.00 | 24.64 | 24.16 | 24.55 | 24.60 | 24.15 | 23.75 | 23.81 | 23.19 | 23.75 |