A thing dissenters say about global warming is that volcanoes contribute way more than human activities. Back in 2009 Scientific American said nuh-uh.
According to the U.S. Geological Survey (USGS), the world’s volcanoes, both on land and undersea, generate about 200 million tons of carbon dioxide (CO2) annually, while our automotive and industrial activities cause some 24 billion tons of CO2 emissions every year worldwide. Despite the arguments to the contrary, the facts speak for themselves: Greenhouse gas emissions from volcanoes comprise less than one percent of those generated by today’s human endeavors.
200 million v 24 billion. Hard to argue that it’s close.
… Read the restAnother indication that human emissions dwarf those of volcanoes is the fact that atmospheric CO2
