**1.1 The challenge of combining housing and food production**

Food and related activities—production, processing, distribution, consumption, and postconsumption—are key contributors to urban-scale unsustainability in environmental, social, and economic terms [16]. The current food production system has optimized food supply chain management, lowering product costs but with major negative consequences [17]. These impacts not only affect the natural environment (loss of agricultural and natural biodiversity; increased competition for land, land grabbing, and new forms of food colonialism), but especially cities, which are becoming increasingly distant—not only physically—from places of production. The main related issues include environmental pollution (waste, land consumption; reliance on fossil fuels and GHG emissions, traffic, and water consumption for production),
