The entity posted thusly:

>white smoke, if it is truly white, is caused by *water* - so say the
>experts.

Don't think so. Water causes water vapour. It looks entirely different
than smoke, though I guess there's an outside chance that someone
could mistake it for smoke.

White smoke, or at least 'quite white' has poured out of my rear-tine
cultivator when a friend filled the tank from a jerry can meant for my
chain saw.