A COP30, in Belém, was, above all, a conference anchored in reality. At the same time that it brought biodiversity, tropical forests and the rights of indigenous peoples to the center of the discussion, it sought to establish itself as the COP of implementation, invoking more organization to execute the requirements of the Paris Agreement than programmatic progress. The synthesis political agreement — the so-called “Global Mutirão”, an indigenous term that evokes community and collaborative work to achieve a common goal — mirrors this spirit. The aim is to consolidate an “implementation infrastructure” that the Paris Agreement called for: adaptation indicators, acceleration instruments, integrity in carbon markets, operational recognition of the just transition and signs of financial scale. It does not solve everything, however, approved by almost 200 countries, it defines a practical architecture to advance mitigation, adaptation, financing and transparency, and paves the way for subsequent steps in 2026. Belém has set an implementation agenda for the critical decade, the decade that scientists like Johan Rockstöm, from the Potsdam Institute for Climate Impact, who we had the pleasure of listening to, consider the last window of hope to reverse the negative climate trajectory.