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Percentage changes in air pollutants pre-2020 and 2020 period
| . | NO2 | SO2 | O3 | ||||||
|---|---|---|---|---|---|---|---|---|---|
| . | Lagos | Kaduna | PH | Lagos | Kaduna | PH | Lagos | Kaduna | PH |
| Jan | 12.0 | − 43.0 | − 8.0 | − 55.8 | 16.8 | − 22.0 | − 0.4 | − 0.1 | − 1.0 |
| Feb | 32.4 | − 17.6 | 3.7 | − 47.3 | 42.9 | 15.9 | 1.5 | 2.7 | 1.5 |
| Mar | − 1.4 | − 3.0 | − 21.8 | 54.1 | 10.5 | − 37.3 | 2.2 | 1.9 | 1.9 |
| Apri | 0.3 | 12.0 | − 1.1 | 1.7 | 8.9 | − 215.5 | 1.5 | 0.0 | 0.7 |
