Ensuring food security
In a recent perspective, "Food security under climate change" (1 February, P. 580), M.E. Brown and C.C. Funk conclude that improved seed, fertilizer, land use and governance lead to food security. I find these claims highly questionable. The green revolution model (monocultures of improved crops supported through high levels of agrochemical and other inputs) has done much to increase agricultural productivity. It does little, if anything, to increase food security. (Letters)
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