As the global population rapidly urbanizes, we need to move our agricultural production to within urban and peri-urban areas. The environmental and social costs of large-scale, industrial farming are huge, and include the fallout from widespread pesticide and chemical use, the depletion of land resources, and the progressive depopulation of rural areas. In regions where land is at a premium or climatic conditions are not favorable for outdoor farming, the only alternative is the controlled environment agriculture (CEA) ‘plant factory’ – whether an indoor, vertical, or greenhouse-based facility. The advantage of CEA is clear: safer, standardized, pesticide-free produce with short delivery ‘circuits’ that are less polluting.