Yn erthygl , sgrifennodd
Les & Claire :
I think it may be microbes, fungi, bacteria etc. Dormant during dry spells
but bursting into life during damp periods.

But it's the so-called "fragrance after the rain" we're talking about, not
the "fragrance when it's wet".

I've been told ozone has something to do with it - though I've no idea
why it would. But that uplifting feeling it gives you would certainly
back that up.

Adrian

--
Adrian Shaw ais@
Adran Cyfrifiadureg, Prifysgol Cymru, aber.
Aberystwyth, Ceredigion, Cymru ac.
http://users.aber.ac.uk/ais uk