Tourism is the world's largest industry and its fastest growing one. It has the potential to contribute significantly to the economic development in most countries, including the developing world. This publication analyses market and political failures in relation to tourism development and the environment, and the implications of those for national gains from international tourism, for public finance and policy, and for the sustainability of tourism. Case studies cover a spectrum of countries, ranging from developing economies to those more economically strong. Emphasis is put on ecotourism and the sustainable use of natural sites, methods of evaluating the sustainability of tourism and the impacts of pollution on this service industry. This work is designed to prove useful to economists, environmentalists, tourism scholars and professionals.