The circular economy (CE) is gaining momentum in cities. To ensure a sustainable CE, it is crucial to measure the environmental performance of CE strategies. However, environmental assessments overlook several strategies that are a key feature of urban CE practice. These include reuse and repair, sustainable built infrastructure and urban land use, green public procurement, smart information and access technology.

To provide insights into the environmental performance and potential of these strategies, industrial ecologists and municipalities should:

• collaborate with urban systems experts
• quantify the environmental impacts of entire urban systems
• combine environmental assessments with social and economic feasibility ones.