Objective: To describe and analyze the meanings attributed by a group of adolescents to environmental health. Methods: A qualitative, descriptive, exploratory study, that utilized action research in a public school in the interior of Ceara, that was located in proximity to the construction of a thermoelectric coal power plant. We used free observation, field notes and a group approach, by means of the technique of historical design of the theme, and were guided by the question: What do you understand about environmental health? Results: Discussions emerged with respect to the interference of man on nature, harming the plants, sustainable development and pollution risk in the community. Conclusion: We found that nurses can be environmental educators and work in this space, encouraging moments of reflection about actions committed to the socioenvironmental locus.