Traditional secondary science education draws on markedly different pedagogies than those made use of in contemporary environmental education, therefore, embedding environmental education within secondary science curriculum presents both epistemological and practical difficulties for teachers. This ethnographic study examines the work of six secondary science teachers in Northern Ontario, Canada, as they engage in an action research project focused on merging environmental education in their science lessons. Over the course of five months the teachers examine and discuss their views and their professional development related to the project. In the place of definitive conclusions, six propositions relating the work of secondary science teachers to environmental education, form the basis for a discussion of the implications of the study. The implications are particularly relevant to secondary schools in Ontario, Canada, where the embedding of environmental education in science studies has been mandated. (Contains 1 table.)