1. Water scarcity assessments in the past, present, and future Liu, Junguo; Yang, Hong; Gosling, Simon N.; Kummu, Matti; Flörke, Martina; Pfister, Stephan; Hanasaki, Naota; Wada, Yoshihide; Zhang, Xinxin; Zheng, Chunmiao; Alcamo, Joseph; Oki, Taikan 2017 Articles Water securityEconomic developmentWater-supply--Mathematical modelsNatural resources—Management