Sulphur dioxide | 1.01 (0.99 to 1.03) | 0.99 (0.92 to 1.07) | 0.97 (0.92 to 1.02) | 1.01 (0.98 to 1.04) | 1.00 (0.91 to 1.11) | 0.95 (0.89 to 1.01) |
Acidimetric method | 1.01 (0.99 to 1.02) | 0.97 (0.92 to 1.02) | 1.01 (0.98 to 1.04) | 1.00 (0.98 to 1.02) | 0.95 (0.88 to 1.02) | 1.01 (0.97 to 1.05) |
Total suspended particles | 1.00 (0.99 to 1.01) | 0.97 (0.94 to 1.01) | 1.01 (0.99 to 1.03) |
1.05 (1.02 to 1.08)
| 1.00 (0.92 to 1.10) |
1.06 (1.01 to 1.12)
|
Black smoke | 0.99 (0.98 to 1.01) | 0.97 (0.93 to 1.01) | 1.00 (0.97 to 1.02) |
1.07 (1.03 to 1.10)
| 1.03 (0.92 to 1.15) | 1.05 (0.98 to 1.12) |
Nitrogen dioxide | 0.96 (0.93 to 1.00) | 0.97 (0.85 to 1.10) | 1.01 (0.94 to 1.08) |
1.14 (1.03 to 1.25)
|
1.48 (1.05 to 2.06)
|
1.27 (1.04 to 1.56)
|
Nitrogen oxide | 0.99 (0.98 to 1.00) | 0.97 (0.94 to 1.01) | 1.00 (0.98 to 1.02) |
1.11 (1.05 to 1.17)
| 1.06 (0.87 to 1.29) | 1.08 (0.96 to 1.22) |