Water has one oxygen atom, peroxides have two, and now trioxides which have three have been discovered to exist in our atmosphere, at least temporarily, under some conditions.
But before we press the panic button, blame chemtrail aerosols, or otherwise jump to incorrect conclusions:
"These compounds have always been around -- we just didn't know about them"
Huh? If you didn't know about them, how can you say they were always around? Maybe they were, but maybe this observation isn't science.
"But the fact that we now have evidence that the compounds are formed and live for a certain amount of time means that it is possible to study their effect more targeted and respond if they turn out to be dangerous"
"... there could be plenty of other things in the air that we don't yet know about. Indeed, the air surrounding us is a huge tangle of complex...