For much of the 2nd half with the 19th century and perfectly in the 20th, ozone was considered a healthy part of the natural environment by naturalists and health-seekers. Beaumont, California, had as its Formal slogan "Beaumont: Zone of Ozone", as evidenced on postcards and Chamber of Commerce letterhead.[17] Naturalists https://redbottom.us/categories/regular/general/208-ozone-generators-for-home-revolutionizing-indoor-air-quality