Robert Y. Redlinger is Manager of New Business Development at CMS Viron Energy Services, Oakland, California. Per Dannemand Andersen is Head of the Technology Scenarios Programme at Risoe National Laboratory's Systems Analysis Department, Roskilde, Denmark. Poul Erik Morthorst is M.Econ. from the University of arhus, and Senior Research Specialist in the Systems Analysis Department at Risoe National Laboratory.