Nice sound clip, but it's just not true. According to the US Geological Survey, globally, volcanoes on land and under the sea release a total of about 200 million tonnes of CO2 annually. This seems like a huge amount of CO2, but the global fossil fuel CO2 emissions for 2003 tipped the scales at 26.8 billion tonnes. So not only does volcanic CO2 not dwarf that of human activity, it actually comprises less than 1% of that value.
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