Between rising hunger and the prospect of still more supply shortages, dark clouds are hovering over the global food system. Not only has the war in Ukraine limited access to, and raised prices for, food and fertilizer, but extreme weather events are disrupting production, and economic downturns have diminished people’s ability to afford adequate and nutritious diets. Climate change is fueling droughts and exacerbating water scarcity, adding to the list of threats facing agricultural production.