In Russia, the development of the green finance system with regard to a set of environmental, social and governance (ESG) factors is still noticeably lagging behind, which explains the need for outreach activities that include a vocabulary (terminological) component. The aim of this research is to study linguistic trends and features of the usage of environmental vocabulary (terminology) in the increasingly important area of sustainable development and the green financing in the period from 2021 to 2023. The relevance of this research is due to rapid climate change that puts humanity on the brink of survival. Therefore, it is necessary to unite international efforts for the early introduction of scientific and technical achievements. This implies the emergence of new concepts and terms. The paper presents new concepts that emerged in 2021-2023 and materials that have not been previously subjected to linguistic analysis. The idea is to identify the presence of terms selected from English and Russian research materials in the UN terminology database UNTERM and to determine the frequency of their use in English and Russian user corpora via Sketch Engine. Research results demonstrate that in the abovementioned period, the emergence of terminology related to crisis phenomena, such as global warming, loss of biodiversity and land degradation, can be effectively traced. Achieving the sustainable development goals is associated with early and urgent measures to reduce emissions, preserve nature and introduce sustainable patterns of production and consumption with the help of economic and financial levers. A perspective tool for further research in this field could be the application of open neural networks that enable processing of large text arrays.