"George" wrote in message
...
The irritant scarring caused by inorganics, and the adsorption and release
of metal and other contaminants by (charcoal) particulates are not analogs
for wood, any more than volatile organics in tobacco smoke.

Seems pretty clear.
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George,
My point was that the smaller particles, especially those below 2.5 microns,
go the deepest into the lung passages, and are the hardest to emit. Whether
they are carcinogenic or not, they do reduce lung capacity for the time
they're there. This may not be felt on a young healty person, but if you
already have cardiovascular deficiencies, they can be a problem.

Ken Moon
Webberville, TX