Deutsch: Region / Español: Región / Português: Região - / Italiano: Regione geografica
A region is a geographical area broadly divided by phsyical characteristics (physical geography), human-impact characteristics (human geography), and the interactions between humanity and the environment (environmental geography).
With the exception of human geography, geographic regions and sub-regions are mostly described with imprecisely-defined and sometimes transitory boundaries. In human geography however, jurisdiction areas, such as national borders, are clearly defined in law.
Aside from global continental regions, there are also hydrospheric and atmospheric regions, which cover the oceans and discrete climates above the land and water masses of the planet. Land and water global regions are divided into sub-regions bounded by geological features that influence large-scale ecologies.
The concept of regions is important and widely used in the varied branches of geography, each of which can describe areas in regional terms. In other fields of physical geography, regions tend to be based on natural features. Where human geography is concerned, regions and sub-regions are described by the discipline of ethnography.
List of books: Region