A recent editorial in Environmental Science and Policy makes for interesting reading. The editors call for an integrated food system approach to the relationship between food security and environmental change, as opposed to the usual focus on agricultural practices.
Ericksen, Polly J., John S.I. Ingram, and Diana M. Liverman. Food security and global environmental change: emerging challenges. Environmental Science & Policy 12.4 (June 2009): 373-377. Special Issue: Food Security and Environmental Change, Food Security and Environmental Change: Linking Science, Development and Policy for Adaptation. Elsevier Science. Amsterdam, Netherlands.