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    Selection of renewable energy alternatives for green blockchain investments: A hybrid IT2-based fuzzy modelling
    (Springer, 2021) Liu, Juan; Lv, Jun; Dinçer, Hasan; Yüksel, Serhat; Karakuş, Hüsne
    In this study, it is aimed to determine the most suitable renewable energy alternatives that can be used in blockchain investments. In this context, firstly, a wide literature review is made and 6 different criteria that could have an impact on this decision are determined. The analysis process of the consists of two different stages. Firstly, the significance levels of these criteria are calculated with the help of interval type-2 (IT2F) decision making trial and evaluation laboratory (DEMATEL)-analytical hierarchy process (ANP) (DANP) method. According to the analysis results obtained, it has been determined that continuity in energy supply and legal conditions are the most important criteria. Hence, it is recommended that while choosing among renewable energy alternatives, it is necessary to pay attention to the legal regulations in the country. Another important point is that attention should be paid to this issue in renewable energy sources to be selected in order to have sustainable benefit from energy in blockchain technologies. On the other hand, in the second phase of the analysis process of the study, 5 different renewable energy alternatives are listed according to their suitability in blockchain technology. In this process, the IT2 fuzzy VIseKriterijumska Optimizacija I Kompromisno Resenje (VIKOR) approach has been taken into consideration. As a result, it is concluded that wind and solar energy are the most suitable energy alternatives for this technology. Considering the results obtained, it is understood that countries that use blockchain technology should pay particular attention to wind and solar investments. In this regard, companies that use wind and solar energy with individuals or institutions using blockchain technology should be in cooperation. Thanks to these renewable energy alternatives, excess energy consumption resulting from the use of blockchain technology can be achieved with environmentally friendly energy sources. In other words, it will be possible to minimize the carbon emission problem that occurs with the use of this technology.