Preface Two
“Overcoming the crisis in water and sanitation is one of the greatest human development challenges of the early 21st century,” according to a recent U.N. report. About one in every six people today do not have sufficient access to clean drinking water. More than 1.2 billion people live in areas of water scarcity; rivers are drying up, groundwater levels are declining rapidly, freshwater fisheries are being damaged, and salinisation and water pollution are increasing (1). As a result, 2.2 million deaths per year are related to water/hygiene and public health; many of these are children. Such problems are forecast to grow worse, with more than half the world’s population facing chronic to critical water shortages by 2050, limiting ...
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