4 pollution concepts, namely air pollution, water pollution, soil pollution, and noise, were rated by 102 female college students on 13 7-point semantic differential scales along with the concept of a man-made event in the form of traffic accident and the concept of a natural disaster in the form of typhoon. The data of all concepts were factor-analyzed from a correlation matrix based on the 13 scales. Extracted factors were as follows: Psychological stability, nature-artificiality, predictability and polluted area. In addition, factor analysis based on correlation coefficients among the 6 concepts shows that these 4 pollution concepts are perceived to be man-made events.