"This research presents the factorial structure of a scale designed to measure ecological behavior and its relationships with value priorities (Schwartz, 1992; 1994) and demographic variables. 255 students of a public university and a secondary public school in Brasilia (139 females and 116 males) with average age 22.70 years (SD = 6 years) answered Schwartz's (2001) new instrument (The Portraits Questionnaire - PQ) and a measure of ecological behavior. PQ includes short portraits of 40 different people, which describe a person's goals, aspirations and wishes, all expressive of the same single value type. An instrument based on Karp's pro-environmental behavior (1996) adapted to the Brazilian reality measured the ecological behavior. Principal factor extraction with oblique rotation was performed on the 36 items of the Brazilian Ecological Behavior Scale (BEBS). Principal component extraction was used prior to principal factor extraction to estimate number of factors, presence of outliers, absence of multicollinearity, and factorability of the correlation matrices (Tabachnick & Fidell, 2001). Four factors were extracted. As indicated by SMCs, all factors were internally consistent and well defined by the variables; the highest SMCs for factors from variables was .67. With a cut of .30 for inclusion of a variable in interpretation of a factor, 24 of the original 36 variables loaded on four factors labeled "economy" (turn off the lights when I leave the room; turn off the faucet while brushing my teeth), ...."