Through an ethnographic exploration and in-depth interviews with Ostrava former miners, heavy steelworkers, researchers, urban planners, social workers, and activists, the project investigates and draws connections between Ostrava’s mining past, its post-industrial present and its envisioned green future. It highlight the parallels and discrepancies between the current profit-driven socio-economic and political models and the speculative alternative that the Green Transition embeds. “Mutual Core” is an attempt to visualize the limits to the future imaginaries as perceived by our participants and the current system’s limits to envision future beyond growth (as encapsulated in the paradigm of green capitalism). From fossil energy to green energy, from capitalism to green capitalism: what shape will the future take when built on principles that mirror, if not amplify, the same modes of existence and relations we struggle with but ought to revise?