Earth

The World of Avatar is the world in which is divided into Four Nations, and home to hundreds of species, namely humans. World is also a common name for the sum of human civilization, specifically human experience, history, or the human condition in general. The World of Avatar also plays home to benders, and the hundreds of chimeras creatures.

Geography
The World of Avatar is divided into four separate nations, the Water Tribes, the Earth Kingdom, the Fire Nation and the Air Nomads. Each location has unique physical geography, landmarks, climates and demography, and each has a diverse range of landforms.

Bending Arts
Possibly the most unique feature of the World of Avatar is the ability to bend the elements. The bending techniques, Waterbending, Earthbending, Firebending and Airbending are dispersed across the Water Tribes, the Earth Kingdom, the Fire Nation and the Air Nomads respectively. Each nation has its' bending masters, who train the younger benders how to use the technique, and pass the culture through the generations. The bending abilities are very significant to all aspects of life in the World of Avatar.

Avatar
Only the Avatar can bend all four elements, as he/she is the reincarnation of the Earth. The Avatar also acts as the bridge between the Physical World and the Spirit World. It is seen as the Avatar's duty to master all four bending disciplines, so they can keep balance amongst the Four Nations.

Flora and Fauna
Fauna in the World of Avatar has a notable characteristic in that most animals are crossbreeds of two real world animals. Flora in the World of Avatar varies greatly between the Four Nations, depending on the weather and climate. Fauna is used primarly as a source of food, and transport across desolate landscape, such as the Si Wong Desert. They are also used as a source of clothing, and some animals are even an icon for religious beliefs, in terms of the Spirit World. Flora is utilized for decorations, gifts, and of course tea.

Economy
All Four Nations in the World of Avatar have, or previously had, developed economic systems. Of those four, the Earth Kingdom and the Fire Nation had developed sophisticated and advanced economic systems to facilitate and supplement their daily life. It is known that foreign money can be accepted as currency in some nations.

Spiritual Beliefs
Spiritual Beliefs in the Four Nations is defined mostly through respecting various nature spirits, of whom most abide in the Spirit World. Beliefs differ greatly amongst the Four Nations.