Environmental Education (EE), a new educational paradigm, has been facing several challenges during its institutionalization process in Brazil and in the world over its thirty years trajectory. Since 1999, the Brazilian EE National Law made mandatory its diffusion in every social instance, such as the media, enterprises, countryside municipalities, and within each formal education level. The EE interdisciplinary nature has indicated its inclusion through a transversal approach within educational processes. Considering the difficulties within cultural, bureaucratic, politic and even psychological and social instances, such proposition continues - besides many developments achieved -, far from its goal. The institution of higher education, ideally, should be a social changing locus, as it has the purpose of being a place for educational development in many ways. However, being traditionally conservative within its practices, it is not doing well concerning EE. Even so, there are professors whom, despite difficulties, develop educative-environmental practices truly committed with social change. The reasons which motivate and mobilize them in this direction are the key matter that guided this research. By hypothesis, this work proposes that personal values are decisive factors leading these university teachers into this option. In this case, what means and moral experiences have produced such values? How was it? How are they regularly expressed? In order to understand their motivation it was applied the oral history research approach through personal depositions, obtained through interviews. Mixing memories, daily practices, and choices, the interviews explore university teacher s personal and professional trajectory, trying to proceed beyond simple theorizations about required values. Furthermore, their practice and educational ideals were compared, being taken the coherence and the shame as alignment indicators between their speeches and values. A large quantity of stories indicates a strong relation between the main values of each teacher and their social practice. Yet, as a common characteristic, such professors share an idealistic profile and taste for life, valuing justice, solidarity, gratitude, human relationship and responsibility, elements which they develop by great commitment and dedication to work, understood and pursued as life project accomplishments. Innate ideas, family background, educational and social-cultural experiences also seem to have contributed to the life choices of our research s participants. It is expected the investigation of these personal profiles and experiences may inspire the development of learning processes, within initial or further education levels, in order to disseminate the Environmental Knowledge and the Ecological Subject matter. It is intended, ultimately, this thesis can contribute to the discussion about value-maker pedagogical processes within the Environmental Education field.