AUTHOR=Knorr Dietrich , Khoo Chor San Heng , Augustin Mary Ann TITLE=Food for an Urban Planet: Challenges and Research Opportunities JOURNAL=Frontiers in Nutrition VOLUME=4 YEAR=2018 URL=https://www.frontiersin.org/journals/nutrition/articles/10.3389/fnut.2017.00073 DOI=10.3389/fnut.2017.00073 ISSN=2296-861X