Represent the environment and the environmental issue in an ecosystemic reading and the impacts of human activities such as tourism. Environmental degradation phenomena, impacts on matrices and the population. Environmental indicators, global, areal, punctual interpretative schemes. The interpretative schemes and the headline indicators. environmental accounting systems. The phases of the debate on environment and development, global and local. Environmental skills: subjects of environmental and tourism policies, the World Tourism Organization (WTO) and, in a multiscale perspective, the European Union, etc. Between clean-up and prevention, the birth of environmental policies and the tools associated with them dedicated: regulatory instruments, economic instruments, voluntary instruments and environmental budgets. Impact assessment: from the SIA to the Aarhus Convention and the most recent application to tourism activities. Socio-environmental conflicts. Transnational economic networks and global governance.