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I really don't know how people think these are safe, I have a "ozone-free" UVC disinfectant light and it still produces enough ozone to smell pretty bad. I can only imagine how an O3 generator smells.

Older laser printers were notorious for generating Ozone. I don't think people realize that Ozone is also bad for humans in addition to the atmosphere.

Arrrrrgh oxygen is a chemical, everything is made of chemicals.

Oxygen is an element. Diatomic oxygen commonly known as O2 is a chemical. Everything is made of elements, including chemicals.

Oxygen gas, colloquially referred to as 'oxygen', is a chemical.

If you want to be a smartypants I guess noble gases are elementary.

I didn't start the pedantry.

Aquious Ozone is some of the safest and environmentally friendly disinfectant you can find. Only problem is that you need to use it right after making it.