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. ”
Diane Raines Ward märgib oma raamatus „Water Wars – Drought, Flood, Folly, and the Politics of Thirst ”, et 40 protsenti maailma elanikkonnast„ peab ammutama vett kaevudest, jõgedest või tiikidest, mis asuvad nende kodust eemal ”.