The CityLoops project was a Horizon 2020 project which ran from 2019 to 2023. It focused on circular economy solutions for bio-waste and construction and demolition waste (CDW).

The Urban Circularity Assessment is an urban material flow and stock accounting method paired with system-wide indicators to assess the material circularity of a city. The overarching aim of the UCA is to monitor progress toward a circular economy from an economy-wide perspective at the city level, rather than just at the level of individual products or sectors. Only at this scale can system-wide effects like displacement and rebound be captured, as well as the determination made whether absolute reductions in resource use and waste flows have been accomplished or are feasible.

See the overview of the project.