The tourism industry has increasingly recognized and responded to growing environmental concerns. In recent years, there has been an emergence of a variety of categories of tourism considered more environmentally friendly: green, eco-tourism, and sustainable tourism. Much of the literature that has addressed these developments has been orientated to the destination locale or specific to a development. These texts have not sought to investigate and examine the response of government/national tourist organizations to the international sustainability agenda and the responses/actions of tourism enterprises to this greening agenda. This text aims to address this remarkable gap. This indispensable contribution to the field provides a comprehensive, state of the art perspective on progress towards the objectives of sustainable development within the tourism sector across the globe by focusing on the environmental performance and adoption of environmental management systems by tourism enterprises.