Tourism can be viewed as an economic activity, a social and cultural phenomenon, etc., and can be studied from various aspects of economic, sociological, ecological and others. As a social phenomenon, tourism is defined as a phenomenon that is expressed in travel undertaken by a large number of the population due to temporary change of permanent residence for rest, leisure, entertainment, treatment and other reasons, which are usually not related to economic activity and earnings. The term ecology is older than the 20th century, it has been known for over 100 years, but it is not unambiguous. Wastewater, it has finally become clear to everyone, simply must no longer be disposed of in the natural environment without treatment. Septic tanks are a thing of the past, especially in a tourist environment. Today, even the least demanding guests look back on the environment with caring sentiment more than ever before. For islands with a larger population, the problems and procedures are generally considered to be more or less the same as on the mainland. The general conclusion is that on small islands, for ecological and economic reasons, waste is only collected, sorted and transported for further processing to the mainland. Given this, this human activity is in a unique position to become the bearer and leader of change in human society from unsustainable, irresponsible and by nature and ourselves very harmful behavior, towards long-term sustainable, environmentally responsible and humane way of economic action and living in general.