Dynamic Evolution Analysis of Spatial Differences of Carbon Emissions in Beijing-Tianjin-Hebei Region from 1997 to 2017Yange Zhang, Yumeng Shi, Yanchun Gu and Hongyue ZhangE3S Web Conf., 580 (2024) 02007DOI: https://doi.org/10.1051/e3sconf/202458002007