Nearly four billion people around the world are malnourished, while another 2.5 billion have low-quality diets that cause obesity, diabetes, and heart disease. Denning, an agronomist with extensive experience in developing economies, asks how countries can achieve sustainable food security. He carefully examines the essential components of terrestrial food production--including soil, water, seeds, and climate--and shows how they are integrated into what he defines as a "food system." He then offers a five-pronged strategy for overhauling existing food systems to reach universal food security: "sustainable intensification," that is, producing additional nutritious food and halting environmental damage; investing in market infrastructure to move food from where it is produced to where it is consumed; reducing waste and spoilage after harvests; encouraging healthy diets; and supporting people for whom healthy diets would otherwise be out of reach. Governments, private companies, farmers' organizations, nonprofits, and the education sector all have roles in this transformation.
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