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 | 163.7 | 24.2 | 173.8 | 614.9 |
| 1990 | 52.2 | 195.4 | 24.2 | 292.6 | 747.2 |
| 2000 | 27.2 | 212.3 | 25.7 | 380.2 | 519.9 |
| 2007 | 20.1 | 205.6 | 27.2 | 188.3 | 358.5 |
| 2008 | 20.0 | 193.5 | 27.4 | 155.5 | 342.8 |
| 2009 | 15.4 | 182.9 | 26.5 | 140.1 | 324.5 |
| 2010 | 19.5 | 186.8 | 26.7 | 142.5 | 338.3 |
| 2011 | 18.8 | 179.7 | 26.2 | 138.8 | 311.3 |