AUTHOR=Liang Changyi , Zhao Jing , Li Jing , Zhang Rui TITLE=Impact of urban spatial compactness on air pollution in China JOURNAL=Frontiers in Environmental Science VOLUME=Volume 13 - 2025 YEAR=2025 URL=https://www.frontiersin.org/journals/environmental-science/articles/10.3389/fenvs.2025.1491070 DOI=10.3389/fenvs.2025.1491070 ISSN=2296-665X