10.1371/journal.pone.0201364.g011
Tianhang Huang
Tianhang
Huang
Yunjiang Yu
Yunjiang
Yu
Yigang Wei
Yigang
Wei
Huiwen Wang
Huiwen
Wang
Wenyang Huang
Wenyang
Huang
Xuchang Chen
Xuchang
Chen
t<sub>1</sub>/t<sub>2</sub> oval plot.
Public Library of Science
2018
agglomeration
air pollution treatment
impact factors
BTH
distribution characteristics
Viable policy recommendations
PM 2.5 data
mg
U-shaped variation pattern
PM 2.5 pollution
sulphur dioxide emission
PM 2.5 concentrations
road freight volume
PM 2.5 concentration
2018-09-20 17:51:20
Figure
https://plos.figshare.com/articles/figure/t_sub_1_sub_t_sub_2_sub_oval_plot_/7112543
<p>t<sub>1</sub>/t<sub>2</sub> oval plot.</p>