The literature on various aspects of ecotourism is quite extensive. In order to find out major developments that took place in ecotourism, a brief review of existing literature on different aspects of ecotourism is made in this chapter. Tourism industry in India plays a significant role in transforming the society and economy. Pandit Jawaharlal Nehru’s oft-quoted remark, namely

“welcome a tourist and send back a friend” has been the essence of Indian tourism approach in the post independence era. Tourism as an industry has great potential to bring about social and cultural development. Today Kerala is the most sought and trusted tourism brand in India. According to the report of World Travel and Tourism Council (WTTC), travel and tourism in Kerala is expected to grow at the rate of 11.4% per anum in real terms between 2004 and 2013.