Focusing on an array of economic, social, and ecological inconsistencies that continue to plague ecotourism in theory and practice, this book examines ecotourism in reference to other related forms of tourism, impacts, conservation, sustainability, education and interpretation, policy and governance, and the ethical imperative of ecotourism as these apply to the world's greenest form of tourism.This revised edition includes: new information on the magnitude of the tourism industry, nature-based tourism and the pros and cons of mass ecotourism; revised chapters on development, economics, marketing, policy, ecotourism in practice and biodiversity conservation; a section on governance models, ecotourism programmes, operators and guides, interpretation, certification, and ecolodge design; a discussion of ecotourism as an ethical or responsible form of tourism; and, approximately 300 new references. It includes case studies and considers the perspectives of many adjacent fields, including geography, economics, business, philosophy, biology, and environmental studies.