Without dams human progress does not occur. History has proven this. There are 45 000 large dams worldwide serving humanity by providing water for domestic, industrial and agricultural use, generating electricity and attenuating floods. At the same time, dams require measures to minimize and mitigate impacts on local populations and ecosystems. As society's needs for water, electricity and food increase, new dams will be needed. For this need to be met, future dams must be designed and operated in a sustainable fashion, recognizing the potential for existing projects to be made more productive and for other options to be developed

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