Coping with water scarcity An action framework for agriculture and food security

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This report aims to provide a conceptual framework to address food security under conditions of water scarcity in agriculture. The purpose of this report is twofold. First, to define a water accounting framework that allows water scarcity to be interpreted objectively. Second, to indicate where and how agricultural water management can play a more proactive and effective role in response to increasing concerns over global freshwater scarcity.

http://www.fao.org/docrep/016/i3015e/i3015e.pdf