A journey is a movement in space , whether voluntary or forced , made ​​to a more or less distant point in a personal goal (eg tourism) or professional ( business ) or other ( deportation, war , political or environmental refugees ) , travel motivated by sports or socio- cultural or major events.

While the number of inaccessible areas, uncharted and unknown declined , travel has grown considerably and democratized during the twentieth century with the advent of modern transport increasingly fast and comfortable , the railway first, then the automobile and the airplane. This change was made with increasing negative consequences in terms of energy consumption and fossil fuels , fragmentation of landscapes and ecosystems by transport infrastructure and issuing greenhouse gas and other pollutants.