Our food system is currently organized very inefficiently. Our food travels for many kilometers, uses an excessive amount of water, is wasted on a tremendous scale, and also contaminates the environment. And yet, the 7 billion residents of planet Earthll mainly living in large cities ust be fed. In an attempt to achieve this in a sustainable manner, food production must, for the most part, be integrated into the urban infrastructure. Food flats and city agriculture are important alternatives for this.