Oceania
NO2 levels largely decreased over Australia and New Zealand, which is associated with environmental regulations on NOx emissions, such as from cars. Large decreases occurred over many countries, such as the U.S., in Western Europe, and Japan, for the same reason.
| City | Country | Region | 2021 Average NO2 | Change (%) | Uncertainty (±%) |
|---|---|---|---|---|---|
| Wellington | New Zealand |
Oceania | 6.839e+14 | 3.20903 | 8.38 |
| Sydney | Australia |
Oceania | 2.465e+15 | -34.2222 | 5.62 |
| Perth | Australia |
Oceania | 1.102e+15 | -19.7524 | 7.66 |
| Melbourne | Australia |
Oceania | 2.151e+15 | -46.3131 | 8.76 |
| Loy Yang A | Australia |
Oceania | 2.063e+15 | -40.3994 | 7.51 |
| Liddell | Australia |
Oceania | 2.304e+15 | -11.1921 | 9.31 |
| Hobart | Tasmania |
Oceania | 4.248e+14 | -0.102607 | 11.39 |
| Darwin | Australia |
Oceania | 7.185e+14 | -13.8635 | 15.68 |
| Brisbane | Australia |
Oceania | 1.633e+15 | -32.6780 | 5.47 |
| Bayswater | Australia |
Oceania | 2.233e+15 | -3.70568 | 10.54 |
| Auckland | New Zealand |
Oceania | 8.458e+14 | -28.2548 | 7.95 |
| Adelaide | Australia |
Oceania | 1.014e+15 | -29.7936 | 7.59 |