Urban living laboratories: Opportunities for modelling sustainability transitions: Here, a group of academics present Urban Living Laboratories to study sustainable food production systems, using systems dynamic modelling to analyse policy alternatives. Urban Living Laboratories (ULLs) have shown first promising signs of being valuable platforms for understanding transition phenomena. To address our time’s diverse grand societal challenges (like climate change and biodiversity loss), we must transition to truly sustainable systems, possibly the most significant shift facing modern civilisations. Such transitions involve coupled technological, social, economic and environmental shifts and demand transformative approaches with new forms of organisation and management.