AUTHOR=Brachi Paola , Tumuluru Jaya Shankar , Nhuchhen Daya Ram , Chen Wei-Hsin TITLE=Editorial: “Torrefaction Pretreatment for Biomass Upgrading: Fundamentals and Technologies” JOURNAL=Frontiers in Energy Research VOLUME=9 YEAR=2021 URL=https://www.frontiersin.org/journals/energy-research/articles/10.3389/fenrg.2021.769625 DOI=10.3389/fenrg.2021.769625 ISSN=2296-598X