Successful proposals are expected to contribute towards unleashing the potential of environmental, biodiversity and climate data through dedicated European data spaces. This should allow to exploit the major potential of environmental observation data in support of one or more of the European Green Deal priority actions: climate change, circular economy, zero pollution, biodiversity, deforestation and compliance assurance. Successful proposals are expected to address these challenges and contribute across all environmental areas to help harness the power of big data and artificial intelligence for the benefits of the European Green Deal. The proposals should also help in the convergence of use of high performance computing, cloud, data and artificial intelligence resources for Earth system modelling. Proposals should contribute to the implementation of the European strategy for data in the domain of environment/climate and could act as a digital enabler for the European Green Deal in those domains. To provide a sustainable perspective for the results achieved, the data and services developed under the proposals should firmly aim to be connected into the common topical European open infrastructure, Destination Earth. Proposals should leverage environmental, geospatial and climate-related data, which are a prerequisite to better understand issues and trends on how our planet and its climate are changing and to address the role humans play in these changes. Proposals should deliver open access to data useful for decision-making by public administrations, investors, insurers, businesses, cities, rural communities, citizen scientists, civil society and citizens, and for the development of new instruments to integrate climate change into risk management practices across the EU.