The field of environmental health promotion gained new prominence in recent years as awareness of physical environmental stressors and exposures increased in communities across the country and the world. Although many theories and conceptual models are used routinely to guide health promotion and health education interventions, they are rarely applied to environmental health issues. This article examines how health promotion theories and models can be applied in designing interventions to reduce exposure to environmental health hazards. Using the Community Action Against Asthma (CAAA) project as an example, this article describes the application of these theories and models to an intervention aimed at reducing environmental triggers for childhood asthma. Drawing on the multiple theories and models described, a composite ecological stress process model is presented, and its implications for environmental health promotion discussed. (Contains 1 table and 1 figure.)