AUTHOR=Moser Simon , Stendardo Stefano , Luisetto Igor , Lanzini Andrea , Oboirien Bilainu TITLE=Editorial: Circular carbon systems and processes JOURNAL=Frontiers in Sustainability VOLUME=3 YEAR=2022 URL=https://www.frontiersin.org/journals/sustainability/articles/10.3389/frsus.2022.1060723 DOI=10.3389/frsus.2022.1060723 ISSN=2673-4524