In the assessment of the present state of climate change and the proje
ction of its future development and impacts on human society, one of t
he core issues is the interaction between decision makers and the scie
ntific community, Knowledge of the human and natural processes behind
climatic change and of the risks involved should be communicated to po
licy makers in a form that is both comprehensible and useful in the fo
rmulation of policy measures, At the same time, the scientific communi
ty must meet the practical requirements and goals for research set by
decision makers, even if this creates problems involving the validity
of overly hasty answers to questions of paramount complexity, The purp
ose of this paper is to present some results of the study dealing with
these questions and in particular to discuss the future scenarios pro
duced in the course of that project. (C) 1997 published by Elsevier Sc
ience Ltd. All rights reserved.