There is currently immense interest in measuring the sustainability of tourism in general, and of ecotourism in particular. Hitherto, it has been difficult for consumers to know whether claims of tourism destinations and products being "ecologically sustainable" are based on hard evidence. The tourism industry has therefore been developing methods to measure these objectively in the form of ecolabels. This book is the first substantial book to review this subject. Emphasis is placed on the criteria used in ecolabels to determine sustainability, the marketing of ecologically-labelled tourism products and the management of current ecolabels and awards.