Fresh Water: Toward a Sustainable Future
Introduction
It is difficult to imagine a resource more essential to a sustainable economy and to a sustainable, healthy human community than fresh water. Humans cannot live for more than several days without water, shorter than for any source of sustenance other than fresh air. Water is essential to grow, raise, or support in the natural environment every source of food used by human populations, from wild fish and game to livestock and to all forms of plant food, whether cultivated or collected. Without adequate supplies of water we could not rely on trees and other plants for building materials, natural fabrics, paper, and other goods. Natural water cycles play a role in maintaining the relatively stable weather patterns relied on for a sustainable economy and lifestyle, and protect communities from flooding, drought, and other impacts of more volatile climates. Fresh water is also essential to natural communities, the ecological foundation on which sustainable human economies are built. As international water expert Peter Gleick writes, "water runs like a river through our lives, touching everything from our health and the health of ecosystems around us to farmers' fields and the production of goods we consume."1
Unfortunately, human societies worldwide have not always appreciated the need to protect and maintain adequate sources of fresh water. Throughout history, human populations have abused aquatic ecosystems and water sources, either through ignorance, neglect, or greed. From oversalination of agricultural soils in the fertile crescent2 to desertification of what is now the Sahara Desert to contamination of city water supplies and accompanying epidemics of typhoid, cholera, and other diseases, neglect of fresh water has reduced or, in some cases, eliminated entirely the sustainability of human civilizations.