There are many definitions of tourism that help people, keep the environment as it should be, etc: - Sustainable tourism - Responsible Tourism - Fair Tourism - Ecotourism - Green Tourism - Community-based Tourism - Charity Tourism - Pro-poor Tourism and many, many more. Some good definitions can be found on the following links: http://en.wikipedia.org/wiki/Sustainable_tourism http://www.planeta.com/ecotravel/tour/definitions.html