This study investigates under which circumstances increases in circularity through the reuse of use‐phase‐intensive electrical and electronic equipment lead to environmental benefits. We combine dynamic material flow analysis (dMFA) and life cycle assessment (LCA) to assess a Circular Economy strategy toward its environmental sustainability on midpoint and endpoint levels. The hybrid approach measures long‐term implications of policy decisions in multiple impact categories and shows the need to comprehensively evaluate Circular Economy activities. We apply the approach to the strategy of setting reuse targets in a case study on washing machines in Germany. As a consequence of a reuse target, the product portfolio changes over time. The resulting stocks and flows are calculated in a dMFA, and attributed with the respective LCA‐based environmental impacts. We present cumulated impacts between 2015 and 2050 for scenarios with different reuse targets for 18 midpoints and three endpoints of the impact assessment method ReCiPe 2016, and the cumulative energy demand. The latest proposal of a 5% reuse target results in average impact reductions of 1% compared to “business as usual.” An increase of reuse up to 87% results in an average impact reduction of 9%, ranging from an increase of 1% (water consumption) to a decrease up to 26% (land use). This shows that even high reuse rates only have a limited leverage on reducing environmental impacts and that it is therefore necessary to include detailed environmental assessments in a holistic evaluation of Circular Economy activities. This article met the requirements for a gold‐gold JIE data openness badge described at http://jie.click/badges.

The Circular Economy is gaining traction in the European Union and all over the world as a transition away from the extractive and exploitative linear economy. In Hawaiʻi, the cultural value of aloha ʻāina is a philosophy describing a set of values grounded in a relationship of kinship between people and the environment. Aloha ʻĀina structured centuries of sustainability and it has evolved over generations to frame community responses to crucial issues today, such as climate change, oligopolistic markets, and contemporary land management. This paper sits at the intersection of cross-disciplinary collaboration, sustainability, and sustainable development. Participative moderate observations and intentional cross-cultural exchanges of knowledge over five years between scholars and experts in the major fields of indigenous Hawaiian knowledge and industrial ecology inspired the concepts explored in this paper, which address the question of how aloha ʻāina and the Circular Economy can engage with each other in the collective effort to combat climate change, guide sustainable development efforts, and transition societies toward sustainability. Extensive literature reviews and insight gained through site visits to sustainability projects inform the discussion of best practices from opposite parts of the globe—Hawaiʻi and Germany—to put into conversation two worldviews and present resulting implications and lessons learned. Essential findings describe the benefits of knowledge exchange between members of global practitioner networks. By shifting expert and participant roles according to which projects are being observed, cross-cultural characteristics can be explored at a deeper level, which allow participants to employ best practices to their respective theories. The Circular Economy’s engagement with indigenous knowledge systems is an opportunity to ally and produce solutions to the challenges associated with changing the linear economy while addressing both environmental and social justice issues.