KALUNGI, Uganda – A young girl in this small village in East Africa washes with a few drops of water. There is no running water in the village. It is a 45-minute walk to the nearest water, a stagnant pond. Of the world’s 6.6 billion people, 1.2 billion live their lives, like the woman here, with limited access to water. Sanitation is poor. Illness is widespread and often fatal, especially among the youngest children.