Food safety is the need for people to have food that is free of contamination. Food security is the need for people to have access to food. Who has access to safe, nutritious food depends a lot on where they live and how much money they make. For some, getting food is as easy as opening their refrigerator door or going around the corner. For too many, however, safe, nutritious food is not available. They may live in a food desert, or face poverty, conflict, or famine conditions. Many scientists, activists, and nonprofits are working toward alleviating this basic inequity, and the UN has elevated the issue by making it the second of 17 Sustainable Development Goals, “Zero Hunger.”