Water and cities: Facts and Figures
(From: UN-Water Decade Programme on Advocacy and Communication (UNW-DPAC) publication "Water and Cities: Facts and Figures".)
Half of humanity now lives in cities and, within two decades, nearly 60% of the world's population -5 billion people- will be urban dwellers.
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Every second, the urban population grows by 2 people.
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Coping with the growing needs of water and sanitation services within cities is one of the most pressing issues of this century. Sustainable, efficient and equitable urban water management has never been as important as in today's world.
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The exploding urban population growth creates
unprecedented challenges, among which provision for water and sanitation have been the most pressing and painfully felt when lacking.
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The relationship between water and cities is crucial. Cities require a very large input of freshwater and in turn have a huge impact on freshwater systems.
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Due to rapid urbanization, cities face a growing demand for water and sanitation services. To meet this demand, cities are going deeper and further, which leads to over-exploitation of water resources.
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Cities cannot be sustainable without ensuring reliable access to safe drinking water and adequate sanitation.
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Every day, 2 million tons of human waste are disposed of in water courses.
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Some 250 to 500 million m³ of drinking water gets lost in many mega cities each year.
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Saving this amount could provide an additional 10 to 20 million people with drinking water in each mega city. |