npj Urban SustainabilityMapping urban CO2 emission spatiotemporal dynamics in Europe via a nighttime light composite indexWei GuoXiaoling WeiXimin CuiXuesheng ZhaoJinke LiuXueqian GaoMengjun ChaoValerie GrawAndreas Rienow2026-06-26Full textDOI https://doi.org/10.1038/s42949-026-00437-7