In the context of worsening environmental problems and increasing measures to combat climate change, clear and bold decisions are needed to reduce emissions of carbon dioxide (CO2), which is one of the main greenhouse gases. One way to do this could be valorisation, i.e., adding value to a product that is usually considered a by-product or waste. Today, CO2 valorisation is becoming a strategically important area for many countries striving for sustainable development. CO2 valorisation involves converting CO2 emissions into useful products, which not only reduces emissions into the atmosphere but also creates new resources for the economy while simultaneously promoting the technological development of the country. Given the desire to transition to low-carbon technologies and achieve international climate goals, such as the Paris Agreement, the research and implementation of CO2 valorisation technologies is a pressing issue. This process is especially important for regions where CO2 emissions significantly exceed permissible standards and/or where innovative approaches are needed to improve the environmental situation. This thesis proposes an integrated methodology, that can be used as a roadmap for CO₂ valorisation that can serve as a tool for ministries and regional governments in developing a strategy to reduce greenhouse gas (GHG) emissions. The development of such a roadmap will allow efforts to be directed toward the practical implementation of CO₂ utilisation projects, which in turn will contribute to more rational use of carbon resources and support for sustainable development in various sectors of the economy. The methodological section of the work consists of the analysis and application of various methods presented in a number of scientific publications. These publications cover a wide range of issues, from the analysis of CO₂ valorisation options for regional development and the study of barriers to sustainable implementation of technologies to the consideration of legal and economic aspects of CO₂ use in energy. In particular, the methods used include: ⎯ Assessment of regional development scenarios for the integration of carbon capture and utilisation technologies in the energy sector; ⎯ Analysis of the legal framework necessary to support CO₂ valorisation projects; ⎯ Study of policy instruments that stimulate the implementation of these technologies; ⎯ Study of factors that determine social readiness for the implementation of such technologies and the readiness of society to participate in the process through tax and other forms of support; ⎯ Application of life cycle assessment (LCA) and social life cycle assessment (S-LCA) methods to analyse the sustainability of different CO₂ valorisation routes adapted to Latvian conditions. 3 The systematisation of these methods allows to create an integrated methodology, that includes sequential steps and recommendations for the implementation of CO₂ valorisation technologies. The results of the thesis highlight the possibilities and prospects for the practical application of the proposed roadmap at the level of regional and sectoral strategies for reducing carbon emissions. The conclusions emphasise the importance of integrating technical, economic, legal and social aspects to form a comprehensive CO2 valorisation strategy. The thesis is based on ten publications that were developed and published during the creation of this work. The thesis consists of four chapters: literary analysis, methodology, results and discussion. The first chapter, a literary analysis, examines the relevance of the problem, the current situation in the world and in Latvia, and the possibilities for reducing CO2 emissions. Data from national statistics, Eurostat, Our World in Data, as well as examples and experiences from other countries are considered. The second chapter describes the methodology for each of the steps-analyses proposed in the worksheet. The following methods and their combinations are used: ⎯ Analysis of literary sources, statistical data, databases of regional administrations, technical sheets, standards; ⎯ Descriptive and systematic literature analysis of legislation both national and international ⎯ Key Performance Indicator analysis; ⎯ Multi-Criteria Decision Analysis; ⎯ Mapping in ArcGis programme; ⎯ SWOT analysis; ⎯ Fuzzy Logic Cognitive Mapping; ⎯ Survey of respondents (public and entrepreneurs); ⎯ Analysis of a bioproduct production process, calculation of stored and avoided CO2; ⎯ Life Cycle Assessment and Social Life Cycle Assessment. The third chapter describes the results of applying the above methods of analysis. The final chapter, Discussion, concludes the work and summarises the results obtained during the study.