AUTHOR=Brandão Miguel , Lamers Patrick , Olfe-Kraeutlein Barbara , Rickels Wilfried , Sick Volker , Van Der Spek Mijndert , Yang Aidong TITLE=Editorial: Developing and Deploying Negative Emission Technologies: System-Level Assessment and Rationalization JOURNAL=Frontiers in Climate VOLUME=3 YEAR=2021 URL=https://www.frontiersin.org/journals/climate/articles/10.3389/fclim.2021.707872 DOI=10.3389/fclim.2021.707872 ISSN=2624-9553