This volume inc1udes a selection of papers presented at the second European Research Conference (EURESCO) on "The International Dimension of Environmental Policy" held in Acquafredda di Maratea, Italy, in October 2001. We thank those who made this conference possible: the European Science Foundation (ESF), which provided financial and organizational support; the European Commission EURESCO Programme; the Fondazione ENI Enrico Mattei (FEEM) in Milan; and GLOBUS, Tilburg University. The European Science Foundation (ESF), the EURESCO Programme, FEEM and GLOBUS cannot be held responsible for the contents and/or opinions expressed in this volume. Our gratitude also goes to the people who assisted us in editing this volume: the papers' referees, the authors, our publisher Kluwer, and especially to Stefan Jost in Rostock who handled the manuscript with maximum care during the process of copy-editing. None of these persons bears any responsibilities for remaining errors or shortcomings. Laura Marsiliani, Michael Rauscher, and Cees Withagen [Marsiliani, L., Rauscher, M. and Withagen, c.] (eds.), [Environmental Policy in an International Perspective], xi. © 2003 Kluwer Academic Publishers. Introduction a C Laura Marsiliani , Michael Rauscherb and Cees Withagen a University 0/ Rochester and University 0/ Durham, b University 0/ Rostock, C Free University Amsterdam and Ti/burg University 1. THE ISSUES Nowadays, the proteetion of the environment is one of the most debated issues in the international are~a. Because of the transboundary nature of pollution and the characteristic of the environment as aglobaI public good, international co­ operation is highly desirable.