Thinking a World ordinary water intake for food of 1,300 m3/year per capita in 2000, 1,400 m3/year in 2050, and 1,500 m3/year in 2100, a quantity of water of around 8,200 km3/year was needed in 2000, 13,000 km3/year will certainly be needed in 2050, and also 16,500 km3/year in 2100.