In her book Water Wars ​ — Drought, Flood, Folly, and the Politics of Thirst, Diane Raines Ward notes that 40 percent of the world’s population “carry their water from wells, rivers, ponds, or puddles outside of their homes. ”
Dalam bukunya Water Wars ​ — Drought, Flood, Folly, and the Politics of Thirst, Diane Raines Ward mengomentari bahwa 40 persen populasi dunia ” memikul air dari perigi, sungai, kolam, atau kubangan ke rumah mereka ”.