Volcanoes and Global Warming?

Question

I wrote a question about Yellowstone and GW effects and a lot of people said CO2 would be responsible for GW effects in the long term. On (whatever) show I was watching, the narrator specifically said that the dust cloud that formed immediately afterwards could not have been responsible for the unusual cold spell that lasted for a while. I used the abbreviation SO2 which is where a lot of respondants apparently thought I was refering to CO2. But, it does bring up the question why volcanoes supposedly submit so much CO2 if the Krakatoa one caused problems by emitting too much SO2?
(BTW, I am not trying to be rude but it does make me very doubtful about the statement that CO2 from volcanoes is part of GW.)

Answer 1

I'm still thinking GW is based on bad science. I think I watched the same program, there are a lot of gasses released by volcano's. At one point the earth was completely covered in ice. It was the volcanoes releasing tons of CO2 the got the planet out of "Snow Ball Earth" state and into a more live able environment. The dust cloud didn't let light get to earth keep warmer temps, so the planet cooled to the point of being in cased in solid ice. A major eruption of Yellowstone would cause snowball earth by the tons of material ejected into the atmosphere. If there were a lot of active volcano's that releases green house gasses then the earth could warm back up, otherwise it'd be a huge ice cube(sphere).

Answer 2

Carbon Dioxide does contribute to Global Warming.
It traps in heat. Methane is also a Green House gas.

The cooling effect would be based on the reduction of light reaching the surface.

Answer 3

CO2 from volcanoes forms a tiny part of terrestrial CO2 emissions,
So tiny, in fact, that it's hardly worth mentioning at all