Economics () is the social science that studies the production, distribution, and consumption of goods and services.
Health is the ability of a biological system to acquire, convert, allocate, distribute, and utilize energy with maximum efficiency. The World Health Organization (WHO) defined human health in a broader sense in its 1948 constitution as "a state of complete physical, mental and social well-being and not merely the absence of disease or infirmity." This definition has been subject to controversy, in particular as lacking operational value, the ambiguity in developing cohesive health strategies and because of the problem created by use of the word "complete", which makes it practically impossible to achieve. Other definitions have been proposed, among which a recent definition that correlates health and personal satisfaction.
Tourism is travel for pleasure or business; also the theory and practice of touring, the business of attracting, accommodating, and entertaining tourists, and the business of operating tours. Tourism may be international, or within the traveller's country. The World Tourism Organization defines tourism more generally, in terms which go "beyond the common perception of tourism as being limited to holiday activity only", as people "traveling to and staying in places outside their usual environment for not more than one consecutive year for leisure, business and other purposes".
My writing is a combination of three elements. The first is travel: not travel like a tourist, but travel as exploration. The second is reading literature on the subject. The third is reflection.
Ryszard Kapuscinski in: Shannon Hurst Lane The Definitive Guide to Travel Writing, Lulu.com, 2007, p. 24
The sheep like nature of travel - being on a beach with thousands of other people is not my idea of fun. I also don't like being a tourist because you don't know what's really going on in a country.
Diana Quick in: Caroline Rees Diana Quick's Travelling Life, The Telegraph, 7 September 2013
Healthy does not mean "healthful." Healthy is a condition, healthful is a property. Vegetables aren't healthy, they're dead. No food is healthy. Unless you have an eggplant that's doing push-ups. Push-ups are healthful.
George Carlin, Brain Droppings (1998), p. 120