A majority of the matter in inner-stellar space is plasma. All the stars that shine are all plasma. Plasma is a high energy electrically charged mixture of ions and electrons. While plasma is the most abundant phase of matter in the universe, on earth it only occurs in a few limited places. Plasma appears on earth only in places like lightning bolts, flames, auroras, and fluorescent lights.
Natural plasma exist only at very high temperatures, or low temperature vacuums.
Artifical plasma can be created by using electrical charges on gas, this is seen in neon signs. Plasma at low temperatures is hard to maintain because outside a vacuum low temperature plasma reacts rapidly with any molecules it encounters. Currently scientists are working on putting plasma to effective use. Ideally, to be useful, plasma would have to be low energy and somehow survive without instantly reacting and degenerating. The approach currently being advanced to solve the plasma problem is the application of magnetic fields.