## 5 Conclusions  
At the Conference of the Parties in December 2015 (Paris Agreement), 195 countries agreed to take urgent action to combat climate change by limiting global warming to well below 2 \({}^{\circ}\)C and pursuing efforts to limit it to 1.5 \({}^{\circ}\)C. The space industry, and related applications and tools, gives rise to a significant and innovative approach to clean energy generation; it is enough to think that starting from satellite missions, providing more and more accurate weather information, we are able to map every area of the globe, overcoming data limitation due to the lack of meteorological ground stations. The novelty of this work comes from the emphasis given to one of the most innovative fields of study (i.e., space research) for finding solutions for our environment by trying to exploit already existing technologies, such as EO satellites or deep space exploration applications (them being mostly circular systems). Applying RESTcreen software could be useful in the pre-feasibility phase to discriminate the type of installation that is not efficient for the selected location or not convenient in terms of IRR on equity. Results of our analysis indicate that, looking at the geographical context of our case studies, the wind turbine system is much more efficient than the photovoltaics in terms of financial indicators as well as the annual emission reduction of greenhouse gases. There is a need to expand research based upon space exploration applications to develop capacity building and create less uncertainty for financing long-term projects to accelerate the circular economy framework. Governments and industry must increase R&D efforts to reduce costs and ensure space-based technologies' readiness for rapid deployment, while also supporting longer-term technology innovations. Conceptualization, M.A. and P.M.F. ; methodology, M.A. ; software, M.A. ; validation, P.M.F., formal analysis, M.A. ; investigation, M.A. ; resources, M.A. ; data curation, M.A. ; writing--original draft preparation, M.A. ; writing--review and editing, P.M.F. ; visualization, M.A. ; supervision, P.M.F. ; project administration, P.M.F. All authors have read and agreed to the published version of the manuscript. This research received no external funding. The authors  
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