According to Martinko (2012:165), a workshop is a modern form of interactive learning and teaching that is shaped according to the model of experiential learning. Certain activities encourage collaborative and experiential learning that takes place within the group interaction of 15-20 participants. "The concept of sustainable development defines the approach to the use of available resources and their management so that today's needs are met, but without compromising future generations in meeting their needs." (Đikić,2001: 335) Education has taken a major role in raising individual awareness of sustainable development. It encourages children's activity, independence, cooperation, develops ecological criticism and creativity. The goal of education for sustainable development is to empower today’s students for the time to come. It is important to develop positive values among children from an early age towards the preservation of the environment and to make them aware that it is possible to achieve economic growth and development that does not disturb the natural balance. According to Tufekčić (2015:21), the subject of the study of ecological pedagogy is the ecological education of the individual, but also of the entire society. It deals with the research of the legality of ecological education, the ecological side of personality education and the influence of other educational areas on the ecological education of an individual. The thesis consists of two parts. The first part explains the development of Green Libraries in the world and in Croatia. Theoretical bases of sustainable development and ecological pedagogy are also stated as the foundations of the work of the Green Library. The methodological part of the paper describes the ways of conducting the Green Library workshops of the Faculty of Education on the occasion of important celebrations of ecological dates: World Soil Day, International Mountain Day and International Day against Plastic Bags.