Earth Observation (EO) data have become indispensable for understanding and managing environmental change. The OpenEarthMonitor project (and other efforts) have highlighted that the societal value of EO can only be realized when data is not only open but also FAIR—Findable, Accessible, Interoperable, and Reusable. Use cases and demonstrations are already showcasing evolving frameworks and technologies for enhancing the FAIRness and openness of EO systems, and narrowing the gap between data production, scientific utility, and policy and service application. The presentation will study some recent EO implications of EU Green Deal policies and the discussion around their evolution, also in light of the Copernicus expansion missions and “new space” developments. We will illustrate several examples on how technology, science and policies interlink and how co-designed EO infrastructures—rooted in open science principles—can align with policy priorities and accelerate progress toward their implementation and performance assessment. Situating FAIR and open EO within the broader technology-science-policy nexus, this work underscores the transformative potential of data-driven environmental governance in the face of a changing role and perception of critical environmental issues in policy and society.