SUSTAINABLE ECONOMIC DEVELOPMENT FROM GLOBAL PERSPECTIVE: TRANSREGIONAL EUROPEAN UNION ECONOMIC DIPLOMACY AND �GREEN DEAL DIPLOMACY�

When considering the (sub)region of Central and Eastern Europe (CEE) and its position in the global economy in relative terms represented by trade openness, the European Union (EU) members from the CEE (sub)region tend to match or even exceed the EU average and EU membership underlines their potential. Recently, environmental concerns have become prominent in international trade and in the framework of its external relations the EU seeks to boost its ambition of a global player. Our paper is oriented on the economic diplomacy and environmental diplomacy theme � in terms of EU competences represented by �commercial diplomacy�, �trade diplomacy� and the �Green Deal diplomacy�. To promote more sustainable developments, the EU�s European Green Deal (2019) emphasises the Comprehensive Strategy of the EU with Africa and this is why the aim of our paper was to assess the EU�s interests in transregional sense by applying the Pareto-optimal scenario/the Nash equilibrium to the qualitative hypothesis formulated: �Geostrategic interests of China and of the postBrexit EU in the process of shaping a new EU strategy towards Africa are partly of a rival and partly of a complementary nature�. When documenting quantitative & qualitative sustainable development trends in the context of international spillovers and relevance of both transregional complementarity & rivalry between the EU and PRC/China, our paper addressed the United Nations 2030 Agenda as well as the African Union Agenda 2063.