Nutrient budgets, flows, and loops: understanding, measuring, and fostering circularity in urban food systems KU Leuven
Cities are important nodes in a food system, even when they lack any agricultural activity. On the one hand, they concentrate consumption and drive food production; on the other, they produce big quantities of nutrient-rich effluents (organic waste, sewage sludge) that are typically wasted and not returned to the soil. Understanding and fostering the circularity of urban food systems through closing, narrowing, and slowing material and energy ...