AUTHOR=Wei Ting , Wu Junliang , Chen Shaoqing TITLE=Corrigendum: Keeping Track of Greenhouse Gas Emission Reduction Progress and Targets in 167 Cities Worldwide JOURNAL=Frontiers in Sustainable Cities VOLUME=3 YEAR=2021 URL=https://www.frontiersin.org/journals/sustainable-cities/articles/10.3389/frsc.2021.793575 DOI=10.3389/frsc.2021.793575 ISSN=2624-9634