INTRODUCTION Tourism is the fastest growing sector and the fastest growing is ecotourism. According to the World Travel and Tourism Council, tourism is the world's largest industry, generating 12% of global gross domestic product. Tourism has been sought to be determined because of the amorphous nature of the activity and because some business travelers and convention goers may participate in tourist-class conferences and activities. Some scholars have attempted to explain tourism although their interpretations are uncertain. Mathewson and Wall (1982) define tourism as the temporary movement of people to destinations outside their traditional location and work area, activities undertaken during their stay, and facilities created to meet their needs. A central part of tourism is precisely one of these recreational and leisure activities. Tourism is generally seen as multidimensional, with physical, social, cultural, economic and political characteristics. DISCUSSION Although tourism is said to be a revenue generating business, it has particularly affected local employment, especially in third world countries. It has affected the political, social, economic and environmental sectors of indigenous peoples. Some of the negative effects include the eviction of people from their ancestral lands, economic dislocation, collapse of traditional values ​​and decay, among others. In the 1950s, the colonial government of Tanzania and Kenya under the British, legalized hunting and trapping. of wild animals by white settlers, thus paving the way for mass tourism. They created zones for the exclusive benefit of hunters and denied access to local inhabitants. Lodges and campsites were esta...... half of paper...... found to vary in the value of environmental media, air, water and soil. The health of biological organisms and humans is compromised. CONCLUSION When working on all these negative effects, this area can be of crucial importance for individuals. It should serve the locals and also the government. In third world countries, due to the lack of adequate knowledge and technologies, the idea is experienced that tourism has more negative effects than positive ones.REFERENCES1. Newsome, D. (2002) Natural area tourism: ecology, impacts and management. University of Queensland Channel View Print, Australia.2. Ouma, J.P.B.M., (1997) Evolution of Tourism in East Africa, East African Literature Bureau Nairobi, Kampala, Daressalam.3. Smith LV (ED), (1997), Host and Guest: Anthropology of Tourism, Pennsylvania: University of Pennsylvania Press.