W Environmental health by WHO 4 All physical, chemical, and biological factors external to a person o The assessment and control of environmental factors that can potentially affect health targeted towards preventing disease and creating health-supportive environments t This definition excludes the social and cultural environment World Health OrganizationEnvironmental health by WHO ♦ All physical, chemical, and biological factors external to a person ♦ The assessment and control of environmental factors that can potentially affect health targeted towards preventing disease and creating health-supportive environments ♦ This definition excludes the social and cultural environment