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Author Topic: 4 Billion People Lack Fresh Water Worldwide  (Read 1004 times)

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4 Billion People Lack Fresh Water Worldwide
« on: February 13, 2016, 11:11:56 PM »

Four billion people ? or two out of every three on the planet ? do not have enough water to meet their basic needs. That is far greater than previously understood, according to a new study that presents a more accurate picture of the problem.

Water scarcity is fueled by population growth, consumption habits and demands from agriculture.

Its impact is evident on the landscape, said Arjen Hoekstra, a professor of water management at the University of Twente in the Netherlands and co-author of the new study in the journal Science Advances.

"Groundwater levels decline and lakes disappear,? Hoekstra said. ?You have less water flowing in the rivers. This threatens ecosystems and biodiversity, and harms local downstream communities where water will not flow."


Unlike previous studies, this work compares consumption to available water on a monthly rather than annual basis from around the world. In their models, researchers included data on climate, land use, soils, crop growth, irrigation, population densities and industry.

Four billion people ? or two out of every three on the planet ? do not have enough water to meet their basic needs. That is far greater than previously understood, according to a new study that presents a more accurate picture of the problem.

Water scarcity is fueled by population growth, consumption habits and demands from agriculture.

Its impact is evident on the landscape, said Arjen Hoekstra, a professor of water management at the University of Twente in the Netherlands and co-author of the new study in the journal Science Advances.

"Groundwater levels decline and lakes disappear,? Hoekstra said. ?You have less water flowing in the rivers. This threatens ecosystems and biodiversity, and harms local downstream communities where water will not flow."

FILE - Livestock find water on parched land in India, July 15, 2014. Half of the four billion people faced with water scarcity live in China and India.
FILE - Livestock find water on parched land in India, July 15, 2014. Half of the four billion people faced with water scarcity live in China and India.
Unlike previous studies, this work compares consumption to available water on a monthly rather than annual basis from around the world. In their models, researchers included data on climate, land use, soils, crop growth, irrigation, population densities and industry.



 

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