By directly linking research processes to change makers, co-production promises to create more impactful knowledge and actions. However, what co-production means in practice is not always clear or consistent. Drawing on the experiences of 32 co-production initiatives from around the world that aim to enhance sustainability, Josephine Chambers, Carina Wyborn, Henrik Österblom, Lakshmi Charli-Joseph, Jessica Cockburn, Rosemary Hill, Ruth Brennan, Chris Cvitanovic and their many co-authors, present a scheme for understanding different kinds of co-production, and the different tradeoffs they entail. In so doing, they highlight 6 modes of co-production that emerge when particular design choices are made