Declining Country-Level Food Self-Sufficiency Suggests Future Food Insecurities

Global food security for a population of 9 billion by 2050 depends on a complex socioeconomic and biophysical system. Current strategies involve decreasing food losses, increasing yields, and improving distribution efficiencies. Herein, we use a systems-based approach to show that contrary to a historically rising global dietary energy production (DEP: per capita calories grown or captured), food self-sufficiency at the country-level has been in...