Plane of Air

The Elemental Plane of Air was filled essentially completely with air but had various impurities that tended to form pockets or bubbles in the otherwise pure atmosphere. Gaseous bubbles included clouds of every type, fog, steam, mist, smoke, poisonous clouds and acidic vapors; also the rare intrusion of elemental fire which is flame without fuel. Liquid impurities were usually water or water-based and tended to form floating spheres when not buffeted or frozen by the winds. Solid matter could be found here, from dust, ash, salt, or sand, to chunks of earth approaching the size of a large asteroid. The larger chunks were often brought into the plane by intelligent beings and were very likely to be inhabited or formerly inhabited. As described by the Great Wheel model, a traveler with a guide could approach the boundaries with the para- and quasi-elemental planes: where the whiff of smoke eventually became hot, thick, and choking, or the tang of ozone soon lead to heavy storms with arcs of lightning in all directions, or the temperature dropped until flakes of snow, crystals of ice, and lumps of hail finally became a wall of ice, or the light faded to gray and the air thinned out until there was nothing.