African leaders say access to safe water and adequate sanitation need a collaborative effort from all sectors for success. Several African ministers responsible for water delivery in their countries, are meeting at the World Water Summit in Durban. The meeting has advocated for the treatment of used or waste water to address water scarcity challenges, especially in Africa. Dr Anthony Turton, an expert on managing trans-boundary river basins, particularly under conditions of strategic risk in water-constrained southern Africa talks about the water summit that was held this week and water pollution...