In the beginnings of climate change policy, results from the natural scienc
es were essential for motivating the establishment of global change diploma
cy. At present it is increasingly being recognised that these results must
be combined with findings from the social sciences if effective climate pol
icy is to emerge. In particular, participatory techniques for the involveme
nt of stakeholders, ranging from ordinary citizens to business people, are
needed. The paper presents the methodology of Integrated Assessment (IA)-Fo
cus Groups, designed primarily for involving citizens in Integrated Assessm
ents of complex issues like climate change. It focuses on collages produced
by European IA-Focus Group participants faced with alternative possibiliti
es of energy use. The results suggest that citizens across Europe see stron
g reductions of current levels of energy use as more desirable than a busin
ess-as-usual perspective, Moreover, they indicate that the opinion formatio
n by citizens is by no means restricted to unambiguous stereotypes. We rela
te these findings to the concept of 'reflexive modernisation', stressing th
e importance of uncertainty and ambiguity in environmental debates. Implica
tions for representing uncertainty in IA models are discussed. (C) 2000 Els
evier Science Ltd. All rights reserved.