
Currently, the majority of the 922 million people in Africa do not have safe drinking water. Drinking 2 L of water per day is sufficient to replenish bodily fluids. So providing Africans with their annual intake of water would require 673 billion liters.
Singaporean desalinization technologies produce 1 cubic meter of fresh water for $0.49. At this price, supplying all Africans with clean drinking water until the year 10,000 AD would cost $2.63 trillion, which is less than Joseph Stiglitz and Linda Bilmes' estimate of $3 trillion for the cost of the Iraq War.