70% of human freshwater use is for irrigation
“Irrigation now claims close to 70 percent of all freshwater appropriated for human use.”
International Decade for Action ‘Water for Life’ 2005–2015: Water and food security,” United Nations Department of Economic and Social Affairs (UNDESA), last modified October 23, 2014, accessed December 15, 2014, http://www.un.org/waterforlifedecade/food_security.shtml