**3. Conclusions**

Summarizing the content of the articles in the special edition "Renewable and Sustainable Energy: Current State and Prospects", it should be stated that the energy transformation processes will systematically develop and will result in further, dynamic development of the RES sector. The process of producing renewable energy is particularly important, because the RES mix allows for the satisfaction of energy needs in the region, and even nationwide. Further development of RES means an increase in the energy security of a given country, which will increasingly use its own RES. This is of grea<sup>t</sup> importance especially at the present time, where, in the face of the war in Ukraine, many countries have given up importing fossil fuels from Russia and are looking for energy solutions in integrated RES. Undoubtedly, the RES sector needs additional determinants of development. One such factor is initiatives in the form of the creation of startups focused on the production, storage and distribution of renewable energy [36–38]. Another issue is to subsidize already existing successful companies in the RES sector by going public and raising new funds from the capital market. Here, the most important thing is the right moment for a company to go public (IPO) [39–42], since on the right moment depends upon the success of the debut in the form of sale of the majority of shares and their good price.

**Funding:** This research received no external funding.

**Conflicts of Interest:** The authors declare no conflict of interest.
