AUTHOR=Borgschulte Andreas TITLE=The Hydrogen Grand Challenge JOURNAL=Frontiers in Energy Research VOLUME=4 YEAR=2016 URL=https://www.frontiersin.org/journals/energy-research/articles/10.3389/fenrg.2016.00011 DOI=10.3389/fenrg.2016.00011 ISSN=2296-598X