TTransportation Research Part D Transport and Environment4/2/2026Mobility heterogeneity influences the relationship between built environment and metro travel emissionsJing Pu·Xiangfeng Huang·Quan Yuan·Wei Zhu·Ru Guo·Xingyu Ding·Jing Liu·Kaiming Peng·Yanei Xue·Chuan CaiRead at Transportation Research Part D Transport and EnvironmentTagsUrban Transport and AccessibilityTransportation