For BbF, although a trend toward slightly lower concentrations was observed at SS50 m compared to SS1 (mean difference = −0.33), this difference did not reach statistical significance ( P = .15).
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Evaluating the Role of Roadside Green Belts in Mitigating Particulate Matter-Bound Polycyclic Aromatic Hydrocarbon Pollution.
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0.1500
0.1500