Perspectives are different frameworks from which to explore the knowledge around sustainable sanitation and water management. Perspectives are like filters: they compile and structure the information that relate to a given focus theme, region or context. This allows you to quickly navigate to the content of your particular interest while promoting the holistic understanding of sustainable sanitation and water management.
Article about bank filtration and its use.
TUFENKIJ, N. ; RYAN, J.N. ; ELIMELECH, M. (2002): The Promise of Bank Filtration. A Simple Technology May Inexpensively Clean Up Poor-Quality Raw Surface Water. In: Environmental Science and Technology: Volume 1 , 423-428. URL [Accessed: 30.04.2015]