The Knowledge Hub is Circle Economy's collaborative library of circular economy case studies. 

The model is open access and everyone can contribute and curate their own collections. It is based on the following three principles:

• Everyone contributes: the knowledge base grows more quickly if everybody adds case studies.
• Everyone edits: It's not meddling, it's co-authoring! Version history ensures nothing is lost.
• Everyone curates: See any irrelevant, duplicate or promotional content? Report it to the Knowledge Hub admins!

Users can filter by key elements of the circular economy, industries, impact, location, policies and SDGs.