[SampleMan]

There are many dozens of active volcanos around the world today.

Only true if you limit yourself to volcanoes being shaped like mount Fuji. If you count all actual volcanoes under the oceans of the world and every small volcano that doesn't rise above 1000 feet, there are thousands of active volcanoes around the world.

[frdalesmith]

This article from scientists at the Hawaiian Volcano Observatory states that volcanoes emit less than 1% as much CO2 as humans. In 2003, volcanic emissions of CO2 were approximately 200 million tons. Human emissions were 26.8 BILLION tons.
Which produces more CO2, volcanic or human activity?