The search for fresh water—to drink, to bathe in, to irrigate crops—is a problem as old as civilization. Across the ages, cities have thrived where the supply is abundant and collapsed in the face of drought. Remarkably, despite the technological progress characterizing the modern era and the fact that most of Earth's surface is covered by oceans, the availability of fresh water remains a pressing concern throughout the world. In this special section, we highlight some of the diverse contemporary scientific and engineering projects dedicated to obtaining and maintaining freshwater resources.
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Yeston et al. (2006) studied this question.
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