Elemental planes

Elemental planes is a collective term that has a few interpretations or contextual meanings. Elemental planes may refer to:
 * the group of six planes placed at the root of the World Tree in the World Tree cosmology model (Air, Fire, Earth, Water, Positive Energy, and Negative Energy.)
 * the same group of six planes placed on the inner-most sphere as described by the Great Wheel cosmology model.
 * just the planes of the four common elements: Air, Fire, Earth, and Water.
 * the six major planes plus the twelve minor planes (the four para-elemental and eight quasi-elemental planes) in the Great Wheel cosmology model, usually called the Inner planes.