Roger E. Kasperson is Director of the Stockholm Environment Institute. He is the leading geographer in the field of risk and risk communication over the last thirty years. His publications include Communicating Risks to the Public (with J. Stallen, 1991), Nuclear Risks in Comparative Perspective (1987), Acceptable Evidence: Science and Values in Hazard Management (with J. X. Kasperson, 1991), and Regions at Risk (with J. X. Kasperson and B. L. Turner, 1995).