If I could get some quality results out of the search engine here slithy I'd get you the url to the thread...My comment at the time referred to an experiment we did in microbiology at uni to highlight the presence of bugs in our everyday life. We sniffed a range of agar plates - one of which, impregnated with the bacteria in question, smelt just like a thunderstorm.

I think ozone gas itself is poisonous - wouldn't want to get a lungful of it.

stales