Table 10.
Correlation analysis of AQI and physical factors

Factors Pearson related
Forest land -0.884
Meadow -0.598
Bare ground 0.636
Number of street trees 0.226
Height of street tree -0.871
Water area -0.917
Number of buildings 0.061
Building height 0.289
Building area 0.415
Building density 0.5
Road area 0.254
Road width 0.227