Fourth part The round tables : Environment-friendly tourism policies The world : globalisation and the sustainable development of tourism The exponential growth of international tourism and the requirements of sustainable development : are there thresholds of ecological saturation? Chairman of the meeting Prof. Peter Keller, President of the Scientific Committee, Professor at the HEC School at Lausanne University, President of the International Association of Scientific Experts in Tourism (AEIST), Bern (Switzerland) Speakers The exponential growth of tourism and its effect on the environment Mr. Richard Tapper, UNEP, Paris (France) The impact of environment policies on the development of a sustainable form of tourism Mr. Christian Avérous, Head of the State of the Environment Division of the OECD, Paris (France)   Mr. Franklin Adejuwon, Minister of Agriculture and National Parks, Lagos (Nigeria)   Mr. Mohamed Saeed, Deputy Minister of tourism (Maldives)   Mr. Patrice Dufour, World Bank, Paris (France) Discussions The region : local development and the environment policy of the Alpine region The need for regeneration in the tourism regions of the Alps in the context of sustainable development : does a high level of ecological achievement bring with it competitive advantages ? Chairman of the meeting Mr. Bernard Debarbieux, Director the Alpine Mountain Laboratory, Joseph Fourier University, Grenoble (France) The limits to mastery of the environment The lesson to be learned from the winter of 1999 Dr. Mario F. Broggi, Director of the Federal Institute of Research on Forests, Snow and the Landscape, Birmensdorf (Switzerland) The point of view of political leaders Mr. Dino Viérin, Head of the Government of Val d'Aoste (Italy) Mr. Wilhelm Schnyder, Head of the Department of Finance and the Economy of the Government of Canton Valais, Sion (Switzerland) Mr. Félix Näscher, Head of OFEFP, Chairman of Alps Convention's "Transports" protocole experts (Switzerland)