Preface

Abstract

This report has been prepared by: Sofia Guedes Vaz --- EEA Jock Martin --- EEA David Wilkinson --- IEEP Jodi Newcombe --- IEEP November 2001 Project manager: Teresa Ribeiro European Environment Agency Environmental issue report No 25 Layout: Brandenborg a/s Note The contents of this publication do not necessarily reflect the official opinions of the European Commission or other European Communities institutions. Neither the European Environment Agency nor any person or company acting on the behalf of the Agency is responsible for the use that may be made of the information contained in this repor