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 | 52.3 | 192.1 | 24.3 | 291.1 | 747.2 |
| 2000 | 27.2 | 204.4 | 26.1 | 379.7 | 517.8 |
| 2009 | 15.6 | 177.2 | 27.4 | 138.2 | 320.6 |
| 2010 | 19.7 | 179.3 | 27.4 | 140.6 | 333.5 |
| 2011 | 18.8 | 172.3 | 26.9 | 134.2 | 305.5 |
| 2012 | 17.3 | 165.2 | 27.2 | 135.8 | 297.0 |
| 2013 | 17.1 | 156.3 | 27.2 | 134.8 | 261.8 |