Ozono translates to "ozone". It's a scientific term not commonly found in song lyrics, making it unique and memorable.
In this song, the artist uses "capa de ozono" (ozone layer) as a metaphor for the protective barrier in a relationship. The lyrics describe how this protective layer, once strong, eventually
Ozono is a breakup song built around one image. The singer was the ozone layer around the person he loved, the thin thing standing between her and everything that could hurt her. That protection fails, and the song is about watching it come apart.
The verses lay out what he gave. He saw the world through her eyes, handed over his life second by second, and walked away from his own dreams to hold her up. None of it held. What broke the relationship was not a betrayal but other people. Gossip got into her head, she was vulnerable to it, and two people quietly became a crowd. The chorus asks the only question he has left, which is not who was at fault but at what moment the layer between them finally collapsed.
The second half turns colder. With her gone there is nothing shielding him either, so the rays get through and the sun burns, and he calls himself a planet spinning in its own dilemma. Maikol El Insoportable closes the track with a spoken warning rather than a plea. She believed the gossip, she is going to crash, and she should watch out for the train.