Table A1.
Statistics of air pollution in Chengdu, 2011–2014.
| Air Pollutant | Mean ± SD | Min | P25 | P50 | P75 | Max |
|---|---|---|---|---|---|---|
| PM10 | 122.7 ± 76.3 | 16.0 | 72.0 | 104.0 | 150.0 | 862.0 |
| SO2 | 28.4 ± 14.6 | 5.0 | 18.0 | 25.0 | 35.0 | 96.0 |
| NO2 | 55.7 ± 19.2 | 15.0 | 42.0 | 52.0 | 66.0 | 144.0 |
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