BROOKLYN PARK, Minn. — A new study says almost one in five Minnesota households cannot afford the food they need. The study, by the food shelf Second Harvest Heartland, found 18% of the state is supported by the emergency food system. Also: 30% of households are not confident about having enough food in the next year. Other findings: Only 60% of households of color are food-secure, compared to 84% of white households.