Table
| Sulphur dioxide (SO2) | Nitrogen oxides (NOX) | Ammonia (NH3) | Non-methane volatile organic compounds (NMVOC) | Carbon monoxide (CO) | |
|---|---|---|---|---|---|
| 1Does not include ocean transport and international air transport. | |||||
| 1980 | 136.5 | 160.6 | 24.3 | 174.8 | 614.9 |
| 1990 | 52.2 | 191.7 | 24.3 | 293.7 | 747.2 |
| 2000 | 27.2 | 205.7 | 26.1 | 381.6 | 519.9 |
| 2009 | 15.4 | 179.8 | 27.1 | 140.0 | 324.8 |
| 2010 | 19.5 | 182.0 | 27.1 | 142.5 | 338.0 |
| 2011 | 18.4 | 174.2 | 26.6 | 135.9 | 309.4 |
| 2012 | 16.7 | 166.2 | 26.9 | 137.3 | 300.6 |
| 2013 | 16.8 | 162.2 | 26.9 | 138.9 | 281.4 |