Ions are molecules or atoms that contain an electrical charge, and these ions exist in nature in various sizes. Small ions only last between 30 and 300 seconds before losing their charge, but they are very active. Small ion densities range from 900 to 1,100 negative ions and 1,000 to 1,200 positive ions per cubic centimeter (ions/cm3) in ideal "fresh air" environments like at the top of a mountain. At sea level we typically experience 500 negative and 600 positive ions/cm3. In cities and inside buildings the ion levels drop by 80% to 95% and are barely detectable in small spaces. As the ion density decreases, so does the corresponding air quality. By increasing the quantity of charged oxygen ions, air quality is improved to “fresh air” levels. The Plasma Air technology reproduces this mountain elevation ion level indoors. This is the basis of Plasma Air's technology.