The overarching goal of ENVRI-FAIR is that at the end of the proposed project, all participating RIs (Research Infrastructure) have built a set of FAIR data services which enhances the efficiency and productivity of researchers, supports innovation, enables data- and knowledge-based decisions and connects the ENVRI Cluster to the EOSC. This goal is reached by: (A) well defined community policies and standards on all steps of the data life cycle, aligned with the wider European policies, as well as with international developments; (B) each participating RI will have sustainable, transparent and auditable data services, for each step of data life cycle, compliant to the FAIR principles; (C) the focus of the proposed work is put on the implementation of prototypes for testing pre-production services at each RI; the catalogue of prepared services is defined for each RI independently, depending on the maturity of the involved RIs; (D) the complete set of thematic data services and tools provided by the ENVRI cluster is exposed under the EOSC catalogue of services via EOSC-hub. The Objectives of ENVRI-FAIRS are to: (1) Develop further the common standards and policies for data life cycle, cataloguing, curation, provenance and service provision within ENVRIs; (2) Develop and implement in each RI the necessary tools for reaching TOP 1, thereby adopting an open approach to sharing data and software; (3) Improve skills of personnel in the RIs to develop and maintain the FAIR infrastructures through extensive training programs; (4) Increase the potential for innovation of each RI by establishing a specific ENVRI-FAIR service catalogue section in the EOSC catalogue; (5) Establish cohesion with global RI landscape, incl. RI clusters and regional/international initiatives in the environmental sector; (6) Expose thematic data services and tools from the RI catalogues to the EOSC catalogue of services at EOSC-hub, COPERNICUS, GEO.