Enter the world of your very own encyclopedia on Ozone. We know all the basics like that this gas protects us from the harmful cosmic rays by its unique layer formation above the stratosphere, we are scared when we find that there are holes formed in the layer. FDA (USA) recognizes Ozone as Generally Recognized As Safe (GRAS). In 1896, Nikola Tesla patented the first ozone generator in the United States. Ozone combined with negative ions (Bio-Oxygen) at the right concentration in air has been proven to be the strongest disinfectant in Mother Earth. Physicians advise that a measured dosage of ozone is necessary for inhaling continuously, as we drink polluted air as much as 15000 litres per day while we drink only 2 litres of water in the same time.