The author reviews the Sixth Conference “The Green Libraries – Libraries of the Future” held within the framework of the Ninth World Professional Conference “The Book. Culture. Education. Innovations” (Gelendzhik-2025”) on June 12, 2025. The theme of the year was” “Information for sustainable development. New and old approaches in the Decade of Science and Technologies”. Two sessions took place: “Information for sustainable development” and “Library ecological movement: Visible prospects”. In total, 9 papers were presented. The Conference organizers see sustainable development principles and goals promotion as one of the libraries’ missions, and implementation of ecological targeting logics as a fundamental task for which the libraries have resources and capability. In this context, to identify the prospects for their sustainable development work, the Conference participants discussed motivation of the libraries, practical experience of implementing thoughtful approaches toward natural resources in libraries and users engagement, facilitation of SDG literature search, including navigation instruments combined with UDC SRSTI (GRNTI), and LBC rubricators. The participants confirmed that there was the background for sustainable development standard for the Russian libraries within the framework of “The Strategy for Librarianship Development in the Russian Federation up to the year 2030”. The standard would facilitate environmental targeting in the libraries; in particular, the author cites the findings of the study that specifies the characteristics of “green libraries” which, in its turn, would support development of relevant standard of Russian “green libraries”. The author emphasizes that while the library ecological movement in Russia is not at its highest point, it follows the global trends.