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Listed in the United Nations report released on the 21st of a series of problems caused by the declining supply of fresh water. These problems include serious pollution, species extinction, and even food safety. Global International Waters Assessment Report of the United Nations Environment Project said : "The lack of fresh water in the next 15 years is likely to lead to more environmental disasters. "This report is prepared in accordance with the views of experts from the world of 1500. The report says that several billions of the world's people living in areas without adequate water, 1.1 billion people have no access to safe drinking water. 40% of the world's population, 2.6 billion people lack adequate drinking water health measures. Lack of freshwater is also trigger a series of environmental problems, which led to reduced water streams, increased salinity of estuaries, reduce shoreline sediments. The report estimated that the direct impact of these changes wil