Ozone was discovered by Christian Friedrich Schönbein in 1840, who noted ozone appeared during thunderstorms and named the gas ozone for its peculiar smell (ozo is Greek for smell). The word ozone comes from the Greek word ozein meaning "smell".
Ozone has unrivalled properties of odour and bacteria killing. It is a natural disinfectant that acts 3000 times faster than bleach. It has a successful past in being applied to wounds to kill gangrene in the 50's, and more recently for killing 'hospital-borne' infections such as MRSA and C Diff.
Ozone is naturally created in the earth's upper atmosphere by UV rays from the sun to form a 3mm thick layer which protects the earth from the sun's rays.In the troposphere, ozone is created by UV light and lightening strikes - this is the fresh smell you get after a thunder storm.
Ozone is also naturally produced by white blood cells and the roots of marigolds as a means of destroying foreign bodies.
Ozone, used properly, at the right low-level concentrations has many benefits, in the food, hygiene and infection/germ control fields.