It's those pesky variables (like a single volcano releasing the
equivalent of 400 years of man-made air pollution)

Volcanoes contribute about 110 million tons of CO2 per year, whereas other
sources ("other" means mailny man made) contribute about 10 billion
tons/year.

Have you got a source for that information? I don't have the figures in
front of me, but I believe your "volcano output" figure is not factoring in
major eruptions that alone can (and often do) put out an incredible amount
of emissions.

Which is actually beside the point. Are emissions bad, regardless of
source? Sure. Are they worth laying awake at night, worrying?

Only if you live a very sheltered life.
--
Jay Honeck
Iowa City, IA
Pathfinder N56993
www.AlexisParkInn.com
"Your Aviation Destination"