This paper critically analyses the construction of eco‐cities as technological fixes to concerns over climate change, Peak Oil, and other scenarios in the transition towards “green capitalism”. It argues for a critical engagement with new‐build eco‐city projects, first by highlighting the inequalities which mean that eco‐cities will not benefit those who will be most impacted by climate change: the citizens of the world's least wealthy states. Second, the paper investigates the foundation of eco‐city projects on notions of crisis and scarcity. Third, there is a need to critically interrogate the mechanisms through which new eco‐cities are built, including the land market, reclamation, dispossession and “green grabbing”. Lastly, a sustained focus is needed on the multiplication of workers’ geographies in and around these “emerald cities”, especially the ordinary urban spaces and lives of the temporary settlements housing the millions of workers who move from one new project to another.