摘要：Providing safe and clean water to communities is not exactly rocket science: the basic technologies and engineering principles are known and mastered, management systems understood, aquatic bio-chemical and physical processes reasonably well comprehended. Despite the relative technological and managerial ease of providing clean water for all, and of evacuating and treating wastewater, it is remarkable that more than one billion people worldwide are still suffering from inadequate, unreliable (both in quantity and quality) and/or difficult access to clean water, and almost two billion from unsatisfactory sanitation. While the humanitarian and socio-economic costs of inadequate water and sanitation services are well known, progress in alleviating water problems remains excruciatingly slow. Meanwhile the supply of water is increasingly embedded in processes of economic globalization. Whether publicly or privately owned, water businesses are expanding their operations geographically and they have become involved in an international competitive process.
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