In this presentation, we will discuss the impacts of tourism on marine environment in Zanzibar. In continuation of this, we will discuss sustainable development challenges regarding small island environments. Among challenges are rapid growing populations, a constantly rising number of tourists, limited freshwater resources, and fragile marine ecosystem. Would you like to learn more about Sustainable Tourism? Sign up for our online course: Sustainable Tourism - promoting Environmental Public Health? (indsæt hyperlink over titel, hvis muligt https://www.coursera.org/learn/sustainable-tourism You are also welcome to join other MOOCs from University of Copenhagen. (indsæt hyperlink, hvis muligt https://coursera.org/ucph). Flemming Konradsen Professor, Director, School of Global Health, University of Copenhagen