The world community is currently facing economic, environmental and social problems that are interconnected at the global level, problems that no country will be able to cope on its own. Therefore, it is time for the G20 Member States to adopt a shared vision that will enable the world's population to achieve an economically prosperous, environmentally sustainable, socially inclusive future, resilient to unforeseen shocks. This highlights the importance that the G20 attaches to current global issues affecting people's lives around the world. The G20 was created as a structure that can respond flexibly to global challenges. Unlike other international platforms, it does not have a rigidly defined, narrow scope of authority. It also does not have a secretariat with clearly defined bodies. The number of member states is quite small, which allows for collective governance. This prompted us to examine the evolution of the G20 agenda over the last 10 years in terms of the scope and depth of issues covered, priority sectors, tailor-made mechanisms and packages, and, above all, the impact of development.Based on the analysis of economic distancing by different parameters of countries and regions, the global problem of uneven development of human potential and income due to different state of economic systems, resources and technologies, economic policy management and efficiency of investment in technological and innovative development. The systematization of modern economic and political associations indicates the combined efforts of states and regions to solve common environmental, economic, social, cultural, technical problems despite the different levels of economic development and resources, as well as to pursue different national economic interests. However, only the consolidation of efforts makes it possible to determine the potential for solving common global problems of states. These proposals and vectors of development of the G20 countries will improve the positive impact on the world economic system in order to balance global economic development, address poverty, hunger, environmental crises, technological gaps.

In the article the authors have developed an eco-economic mechanism for the formation of a system of national priorities in terms of sustainable development. The mechanism is based on the Concept of Sustainable Development, which improves its theoretical basis: characteristics, principles and components. Their manifestation at the world and national level is taken into account. Diagnosis of the state of the countries is carried out The EU-27 as whole and individual countries, namely Germany, Lithuania, Latvia, Poland, Romania, Estonia, Bulgaria, Slovakia and Ukraine in terms of sustainable development in terms of three key areas - economic, social and environmental. Analytical study of trends in indicators for 10 years for the European Union and Ukraine has led to the conclusion that the application of sustainable development strategy leads to positive results. Based on the concept of sustainable development, a set of defined environmental imperatives and the Strategy for Sustainable Development of Ukraine until 2030, the authors formed a system of national strategic priorities.

Global cities arebecoming increasingly important players in the global system. They bring together different cultures, ideas and business opportunities. Understanding their role and functions in global economic governance and international information exchange is key to developing strategies for economic growth, creating favourable conditions for doing business and increasing the competitiveness of countries.The study of this problem has been based on the consideration of various aspects, such as economic activity, transnational governance, information communications, technological development and political participation, which determine the role of global cities. Using methods of comparative analysis, sociological, geographical research and other approaches, the article offers a deeper understanding of the functions of global cities and their impact on the world economy and international information communications.The functional significance of global cities as centres of global economic governance is determined mainly by the scale of their gross regional product, huge economic potential, as well as management and control of the global economy, which is due to the level of concentration of headquarters of large multinational companies, key institutions of the international financial market, mainly transnational banks, advanced business services companies, etc.Global cities are the backbone of the global economic and political system, leading global financial and economic processes, managing global financial flows, and having developed infrastructure and access to a wide range of services. Multinational enterprises actively use the advantages of the transport, political, social and economic position of global cities. In turn, these enterprises have a significant impact on global economic and political processes, contributing to the globalisation of city functions.Since the functional significance of global cities is expressed in many aspects, based on the analysis of available data, reports and studies, they are systematised into two groups: centres of global economic management and centres of international information communications. The characteristic of global cities according to these groups is due to the constant development and expansion of strong ties between countries and the destruction of existing barriers through technological communications and networking.