[SolitaryMan]

Do you have a source or link for that? Good NFO to combat the hysteria.

[RKV]

I stand mildly corrected.

Scientists have calculated that volcanoes emit between about 130-230 million tonnes (145-255 million tons) of CO2 into the atmosphere every year (Gerlach, 1999, 1992). This estimate includes both subaerial and submarine volcanoes, about in equal amounts. Emissions of CO2 by human activities, including fossil fuel burning, cement production, and gas flaring, amount to about 22 billion tonnes per year (24 billion tons) [ ( Marland, et al., 1998) - The reference gives the amount of released carbon (C), rather than CO2.]. [note: and that's a current levels, not for all of history] http://sg.answers.yahoo.com/question/index?qid=20070603200314AAuwnT2&show=7

Remember folks, that's an average. And volcanoes have been around a lot longer than humans have. Therefore, volcanoes have put more CO2 into the atmosphere than humans have in the course of the life of the planet. The earth is approximately 4.7 billion years old (4,700,000,000) and humans have been here for 200,000 years according to best current science. I'll spare you the math of that calculation, and will admit to having no better data available than to straightline the estimate, but it does work out.

The details matter and that is my correction.