Steep conical hills of brown sand and stone ring the city of Lima. Massive cement water tanks cap many of the summits, some bearing a slogan of the city’s powerful water utility, Sedepal: Agua Para Todo (water for all). To an inhabitant of the eastern United States, where water is generally plentiful, and where few lack a working tap, the motto appears at first to be either simply a statement of fact or an easily achievable promise […]