So the waterfall comment, you dismiss it as well? It's not about a discovery, it's not like, OH I FOUND A WAY TO MAKE OZONE! No, I just know what I smell, and you haven't tried it, obviously. You only want to say what you've read, so, we understand you think it's impossible, but my keen fucking nose? Yes, not being an arse, I'm sure. Shove off. "At ground level, ozone may be produced by reactions caused by changes in entropy, e.g. water falling on rocks in a waterfall." So, something happens in the bubble similar to that, is that enough? Google it yourself, no need to be sour, it IS possible that ozone, or negative ions are being created by the bubbler.