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Water cycle and people: water for feeding humanity

Malin Falkenmark

Land Use and Water Resources Research, 2003, vol. 03, 4

Abstract: The distinction of ‘blue’ (liquid) and ‘green’ (vapour) water flow is introduced to make possible an assessment of water flows to be appropriated for future food production. The author offers a ‘backcasting approach’ in assessing the consumptive water requirements for feeding humanity by 2050 and from where the needed water may be provided (irrigation, crop-per-drop improvements and horizontal expansion into grasslands and forests). She concludes that food security will demand a major shift in thinking.

Keywords: Resource; /Energy; Economics; and; Policy (search for similar items in EconPapers)
Date: 2003
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DOI: 10.22004/ag.econ.47862

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