Table 2.
Correlation coefficients among air pollutants.
| Variable | PM10 | SO2 | NO2 | CO | O3 |
|---|---|---|---|---|---|
| PM10 | 1 | 0.46 | 0.37 | 0.37 | 0.29 |
| SO2 | - | 1 | 0.52 | 0.51 | 0.07 |
| NO2 | - | - | 1 | 0.89 | −0.06 |
| CO | - | - | - | 1 | −0.22 |
| O3 | - | - | - | - | 1 |
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