| Pollutant | 2010 | 2021 | 2022 | 2022 as against 2010 | 2022 as against 2021 |
|---|---|---|---|---|---|
| tonnes | change in percent | ||||
| Ammonia (NH3) | 643,785.9 | 527,035.0 | 514,065.2 | -20.1 | -2.5 |
| Sulphur oxide (SOx) | 545,541.2 | 269,069.6 | 275,289.8 | -49.5 | 2.3 |
| Nitrous oxide (NOx) | 2,043,578.3 | 1,508,626.8 | 1,496,531.9 | -26.8 | -0.8 |
| Non-methane volatile organic compounds (NMVOC) | 1,398,702.4 | 1,065,853.0 | 1,058,110.4 | -24.4 | -0.7 |
| Particulate matter 10 micrometre | 299,053.3 | 232,515.9 | 233,724.3 | -21.8 | 0.5 |
| Particulate matter 2.5 micrometre | 184,536.4 | 129,747.8 | 130,346.3 | -29.4 | 0.5 |
| Carbon monoxide (CO) | 3,886,746.9 | 2,743,201.7 | 2,685,325.9 | -30.9 | -2.1 |
As at 14 August 2024