Climate Change - Food Agriculture-based livelihood systems that are already vulnerable to food insecurity face immediate risk of increased crop failure, new patterns of pests and diseases, lack of appropriate seeds and planting material, and loss of livestock Wulf Killmann - FAO 2007 Ericksen, 2007- Conceptualizing food systems for global environmental change research A food system is vulnerable when one or more of the four components of food security – food availability, food accessibility, food utilization and food system stability - is uncertain and insecure.
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