Suggestion for circular economy 101 mapping & discussion: aside from affinity mapping, it might be worth mapping what is known, presumed and unknown in the group.
What do we (the CSAW group) know for sure? What are the histories and current facts available about circular economy?
What do we (the CSAW group) think might be true about circular economy but are not completely certain about?
What does the group not know about circular economy, but are known to someone else? What are the problems without known solutions? What is unknowable?
Based on KPU(U) Framework
KPU(U) can be combined with affinity diagrams. For example, if you're using a spreadsheet, map affinity in columns, KPU(U) in rows). If you prefer circular mapping, the KPU template could be made as an onion diagram (https://en.wikipedia.org/wiki/Onion_diagram), with affinity clusters arranged across three concentric circles.