Since its emergence in the mid-1980s, ecotourism has co-evolved with a number of related activities, including nature-based tourism, wildlife tourism, sustainable tourism. adventure tourism and alternative tourism. All of these terms, to a greater or lesser extent, have been used as synonyms for ecotourism. This is unfortunate, because such careless misuse of the terminology increases confusion and misunderstanding. The purpose of this section is to examine the relationship between ecotourism and these additional terms. As well, this section considers the link between ecotourism and several types of tourism that are usually disassociated completely with ecotourism, including 3S tourism(sea , sand, sun tourism) and mass tourism. The relationship with cultural tourism, consumptive tourism, non-consumptive tourism and various hybrid activities is also investigated.