AUTHOR=Lüthi Christoph , Willetts Juliet , Hoffmann Sabine TITLE=Editorial: City-Wide Sanitation: The Urban Sustainability Challenge JOURNAL=Frontiers in Environmental Science VOLUME=8 YEAR=2020 URL=https://www.frontiersin.org/journals/environmental-science/articles/10.3389/fenvs.2020.585418 DOI=10.3389/fenvs.2020.585418 ISSN=2296-665X