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The world should look to nature for better ways to maintain supplies of water, keep it clean and protect people from droughts and floods, the United Nations said Monday. As the global population expands and the planet warms, demand for water is rising, while the quality and reliability of our supply is declining, the 2018 edition of the U.N. World Water Development Report has warned. Demand for water is expected to increase by nearly one-third by 2050, said Gilbert Houngbo, chair of U.N.-Water, in the report's foreword.The report cited estimates that agricultural production could be increased by nearly 20 percent worldwide if greener water management practices were used.Inside cities, the challenge is to capture and filter more water using "green infrastructure" – from water retention ponds to wild spaces that double up for leisure activities.
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