AUTHOR=Ren Huiming , Zhou Jiawen , Yu Yunjiang , Ye Mingque TITLE=Carbon emission reduction effects of digital infrastructure construction development: the broadband China strategy as a quasi-natural experiment JOURNAL=Frontiers in Environmental Science VOLUME=Volume 13 - 2025 YEAR=2025 URL=https://www.frontiersin.org/journals/environmental-science/articles/10.3389/fenvs.2025.1510118 DOI=10.3389/fenvs.2025.1510118 ISSN=2296-665X