Air Pollution Phenomenology (APP) course deals with basic sciences to understand air pollution. The APP course provides concepts, types, sources, and concentration conversion of air pollution or air pollutants. This course is designed to improve basic understanding of air pollution phenomena which are affected by meteorological factors or conditions, such as lapse late, atmospheric stability, mixing height, and wind rose. Also, this course provides concepts and theories of atmospheric dispersion and concentration estimate at receptors using Gaussian dispersion equations and models. The causes, problems and solutions related to global environmental issues such as ozone depletion or hole in the stratosphere and greenhouse effects. Kyoto protocol, Kyoto mechanisms, and CDM projects are also discussed. Recent technologies and research trends of air pollution phenomena and control are also discussed or presented by students in the class. This course is usually given every spring semester for the junior students who want to major in environmental engineering or civil and environmental engineering.