Legends
Fig. 1 (A) Location of Shenyang in China; (B) Distribution of 7
districts and 76 subdistricts within the third beltway of Shenyang; (C)
Distribution of 76 subdistricts and the three beltways of Shenyang
Fig. 2 Distribution of the results of K-means cluster analysis
at the subdistrict scale: (A) per kilometer benefit (1- benefit value
<1000 $/km, 2- 1000 $/km <benefit value
< 2000 $/km, 3- benefit value >2000 $/km) (B)
per tree benefit (1- 5$/tree <benefit value < 7.5
$/tree, 2- benefit value >7.5$/tree, 3- benefit value
< 5$/tree)
Fig. 3 Comparison of street trees assemblage associating air
purification benefit according to (A) population density, (B)
urban-suburban gradient, (C) public policy