Ozone is a very energetic form of pure oxygen produced in nature. The new growth in rain forests and the new plankton in the sea are producing ozonecontinuously, which rise up into the stratosphere forming a layer that gives out a lot of harmful ultraviolet radiation. Ozone can also be produced by industrial emissions, which does not rise up but causes smog which is harmful to human, plants and animals. Ozone can attach to particles of pollutants and toxic waste in the atmosphere. Owing to large quantities of pollutants emitted by the industrial world, the ozone layer has been severely depleted, making it easy for human to get access to sunburn. Therefore, in order to make the earth a better place to live in, we need ozone generators both for industrial and domestic use. For example, ozone can be used for air purification, waste water treatment and food processing andstoring etc.