**5. Conclusions**

Summarising the results of the study, we note that the European experience of socioeconomic development demonstrates a systematic and integrated approach, including state-of-the-art measures to achieve a climate-neutral Europe. Recent events: Considering Ukraine's application for EU accession under the accelerated procedure, the development of Ukraine after the military conflict requires non-standard solutions to improve the regulation of energy security and nature management.

Unfortunately, in the Ukrainian region, at the beginning of 2022, innovative products have not yet been a significant component of indicators such as gross regional product (GDP) and gross sales. Simultaneously, the state's involvement in the management of innovation processes in the region and their facilitation has a significant impact on the level of innovative regional development.

The environmental goals of achieving a carbon-neutral level of the economy and the decarbonisation of energy-intensive industries involve the introduction of balanced and effective approaches to coordinating financial investments in relevant segments, the formation of a legal and regulatory framework, the use of available resource potential and integration prospects, and the state's environmental facilitation. For example, the decarbonisation of green energy to alternative energy sources can have significant financial implications for households. Simultaneously, the negative consequences of effective state measures of regional greening, as well as decentralisation, can be a positive vector for the development of communities and territories.

The comparative analysis of decarbonisation models conducted in this study allowed the systematisation of its advantages and disadvantages, on the basis of which, in turn, the methodological gap in approaches is evident. These factors are the basis for the development of a hybrid integrated approach to energy decarbonisation policy in Ukraine, which would combine existing models and have a national orientation, taking into account the force majeure circumstances of the recovery of Ukraine's economy. This course of events is actualised by the peculiarities of Ukraine's integration into the European energy system and the prospects of accession to the EU both on a general basis and under the accelerated procedure.

The results of the current study should be considered within certain limitations, which can be addressed in future studies. Thus, the uncertainty of the economic situation caused by hostilities produced methodological imperfections in the study, namely, the limited ability to conduct a thorough analysis using mathematical modelling. In addition, objectively limited access to statistics on the regions of Ukraine requires the adjustment of the survey results, provided that these data are available.

The most effective way to develop the Ukrainian economy will be the development of innovation-active regions and industries, which, in turn, will be drivers of the development of related territories and industries while ensuring synergies. The transition to an environmentally friendly, green economy is a multi-layered process that is not quick and painless. Thus, given the global trends in the framework of green energy transition, it is important to consider planning the development of innovation-active industries and regions of the state.

At the same time, it is necessary to take into account the legal and infrastructural preconditions typical for Ukraine, namely: the social and economic weight of the coal industry; the comparatively low cost and significant share of nuclear energy; obstacles and shortcomings in the decentralisation of the electricity market; negative trends in the development of renewable energy; asymmetry in the distribution of energy resources at the regional level; and the initial position in the development of the energy cooperation movement, but also a strong agricultural sector as a basis for the development of bioenergy, making it possible to state the available resource potential for creating a synergetic impact in various sectors of Ukraine's economy.

**Author Contributions:** Conceptualisation, V.K. and O.B.; methodology, V.K.; software, I.L.; validation, I.L. and A.M.; formal analysis, O.B.; investigation, I.L.; resources, P.O.; data curation, O.B.; writing—original draft preparation, V.K.; writing—review and editing, D.M.; visualisation, A.M.; supervision, D.M.; project administration, V.K. and D.M.; funding acquisition, P.O. All authors have read and agreed to the published version of the manuscript.

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

**Institutional Review Board Statement:** Not applicable.

**Informed Consent Statement:** Not applicable.

**Data Availability Statement:** Not applicable.

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