This study examines how the areas of green transition that promote the implementation of sustainability are related to the perceived level of corruption. The investigation covers 41 countries. The environmental indicators were selected by the authors from the database of the Bertelsmann Stiftung (BS) Sustainable Governance Indicators (SGI) 2022 report after reviewing the literature. Due to its difficult measurement, corruption is usually measured by the perceived level of the presence of corruption, and the authors of this study also used this method in their research. Accordingly, the authors modelled the perceived presence of corruption using the time series of Transparency International's Corruption Perceptions Index. Based on their results, the state's performance in environmental policy plays the most important role, the impact of which is enhanced by participation in international environmental cooperation and treaties. These achievements are threatened by corruption and bureaucracy. Among the environmental indicators, the effect of gross greenhouse gas emissions is the strongest. This effect is negative, i.e. higher output increases the perception of corruption, which is indicated by a decrease in PCI.