Agroecological symbiosis (AES) enhances productivity in agriculture. A case study of the first AES in Finland indicated that productivity of on the organic crop farm could be increased by producing biogas from green manure leys, fallows, and other locally available biomasses. At the same time, the farm became a net-energy producer instead of being an energy consumer. Combining the food processing, crop production, energy production and closer interaction with consumers increase the overall sustainability of the local food syste
