The concept of a "healthful home" offers the basis for a comprehensive approach to addressing the well-established relationship between health and housing. Many environmental health hazards found in homes--such as lead, mold, environmental tobacco smoke, and pesticides--can be reduced or eliminated through the use of scientifically validated (yet sometimes quite simple) interventions that improve health outcomes for residents. A team from the University of Connecticut's Department of Extension developed an effective curriculum for teaching urban 4-H youth leaders, youths, and others in their communities about the importance of healthful homes and practical ways of improving home environments.