Abstract
This article examines the possible unifying effect of climate change on leaders of green groups. The main goal is to identify ideological or North/South differences in attitudes on key aspects of climate change among them. Attitudinal data obtained with a standardized questionnaire administered to leaders from Quebec and Costa Rica are used to generate a typology. Three types of green orientations emerge: "ecologism," "mainstream environmentalism," and "market environmentalism." General perceptions toward climate change and specific opinions about policy options related to global warming are compared on the basis of these orientations and of national origin. Results show that green leaders are divided on all measured attitudes concerning climate change. Most differences are explained by diversity in ideological orientation, mainly by divergent viewpoints held by ecologists. The differences based on national origin are mainly explained by contrasted contextual features between Quebec and Costa Rica. The results do not provide convincing evidence of cognitive solidarity in the green movement concerning climate change.