Using data from a random sample survey of residents In Edmonton, Alberta, and applying LISREL techniques, previously Identified socioeconomic, demographic, and environmental attitudinal predictors are examined and compared across two measures of environmental concem: concem about the environment in general and concem about a specific issue and associated trade-offs. As expected, political party identification and level of education were important determinants in both cases, the significant effect of political party identification is attributed to the relative ideological diversity evident in the Canadian political structure. Contrary to expectations, however, measuring reaction to a specific, local environmental issue and posing economic trade-offs as a consequence did not result In substantially improved explanatory ability, or more pronounced class differences. Instead, the findings support suggestions that environmental concem, regardless of how it is presently measured, is not only wide-spread but also extended across demographic and economic barriers.