AUTHOR=Kaewunruen Sakdirat , Guo Yunlong , Jing Guoqing , Matsumoto Akira TITLE=Circular economy implementation in railway systems beyond net zero JOURNAL=Frontiers in Built Environment VOLUME=9 YEAR=2023 URL=https://www.frontiersin.org/journals/built-environment/articles/10.3389/fbuil.2023.1239740 DOI=10.3389/fbuil.2023.1239740 ISSN=2297-3362