Access to clean water is the key to resolving many of the problems encountered by rural populations in Africa, which remains the most underdeveloped continent on our planet. Water is the fundamental and often rare resource which is essential for agriculture, health, sanitation and life itself. Talk by Carlos Guarita, a photojournalist covering current affairs worldwide, with photographs taken over a period of twenty years while on assignments to Angola, Mozambique, Nigeria, Uganda, Sudan and Burundi.