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The paper addresses a poorly documented issue in the literature, namely the role of clusters in green transformation, including processes related to green, low-carbon, and circular economies. The purpose was to identify and understand the practices of clusters in this area. The adopted mixed research strategy consisted of both qualitative and quantitative research. Both research phases were conducted in a group of Polish Key National Clusters. Through qualitative research, the authors abductively identified practices that are vital for green transformation and categorized them into three thematic areas: Integration, Access to resources, and Education and awareness building. On this basis, the authors developed a method to measure the clusters' level of advancement in green practices, which was used in quantitative research. The results show that the surveyed clusters undertake a number of practices to promote green transformation. They are active in each of the distinguished areas and also engage in its most demanding forms. The study sheds new light on the concept of the clusters, showing how such organizations can be used as agents of change in favor of green transformation. • Research on clusters in relation to green transformation is at a very early stage. • Clusters can pursue various practices to promote green transformation. • Cluster green practices can be grouped as: Integration, Resources, and Education. • Advancement of Polish National Key Clusters in green transformation is rather high. [ABSTRACT FROM AUTHOR]

Although green growth has become the economic development strategy of many countries in the world, and studies have analyzed the influencing factors of green growth from multiple angles, there are few literatures devoted to the impact of fintech and green finance on green growth. From the perspective of fintech development, this paper tries to construct a comprehensive index to evaluate the green growth of regional economy based on the in-depth analysis of the influence mechanism of green finance on green growth. At the same time, China's provincial panel data from 2011 to 2018 are selected to test the impact of fintech innovation and green finance on green growth, and its mechanism. It turns out that fintech and green finance significantly promotes green economic growth. At the same time, the impact of fintech and green finance on green growth has obvious regional heterogeneity, that is, the impact in eastern China is significantly stronger than that in central and western China. Further research shows that fintech innovation mainly promotes green economic growth through green credit and green investment. Therefore, fintech innovation can promote green economic growth by improving the development level of green finance, which has great reference significance for most countries. [ABSTRACT FROM AUTHOR]