[Overpaid Slacker]

Tony -- even if I stipulate that your source would be agreed upon by all, and I don't; you need reading comp. lessons.

"As a long-term average" is very different from one or two (or three or four) large spikes -- Mt. St. Helens and Pinatubo, as I mentioned are some pretty large spikes, which many reputable scientists believe did the "damage" I described. Also, 1883's Krakatoa eruption is the earliest instance I can find of any scientific estimates of the "pollutive" effects of volcanos (not that I'm a vulcanologist...) so the "n" for averages will be relatively low.

Aurel -

Again, my point is not "hey, let's pollute and/ or wantonly release 'greenhouse' gases into the atmosphere," but rather that Kyoto was a woeful means of "controlling" something we don't understand.

Q1 -- Yes, and sometimes much higher than others.
Q2 -- "correlated," yes, but correlation specifically does not mean "causation". There have been large spikes and drops in temperature for as long as the planet has been around. While "dinosaur farts" may make for an interesting prehistoric greenhouse gas theory, the planet does do its thing, regardless of man or the then-dominant species. NOT that mankind can't have an effect...
Q3 -- Not nec. Within a year after Pinatubo, NASA recorded a drop of 1C in the Earth's average temperature, and the cooling effect lasted ~2 years.
Q4 -- Again, "correlation" is a word to be used very carefully when trying to deduce. Not that there couldn't be causation, again.
Q5 -- It is in no small part "attributed to", but I frankly don't know enough about it to say whether I believe it is "due to" or not. I'm skeptical, as I am with all "sky-is-falling" media hysteria surrounding a very complicated topic that Time dumbs down for the masses. Witness the Silent Spring fiasco for the gullibility of the public via ecohysteria.
Q6 -- SO2 emissions are a large cause of acid rain. The USGS estimates that MSH put 1 million tons of SO2 into the atmosphere in 1980, and another million from 1980-1988. Mt. Etna can put out 100 times more than MSH, and Krakatoa about 2000 tons/day. Again, for those of you w/o scorecards, this is not to say man doesn't create 'acid rain', only that man didn't invent it -- it's been around since the planet had atmosphere, more or less.
Q7 -- Absolutely; along with a host of other causes for respiratory problems.

We can and should do more to reduce emissions, but let's get the causation/correlation thing (on a global, scientific level) straightened out first. Man did not invent atmospheric "pollution" nor climatic changes.

JP