Plimer has said that volcanic eruptions release more carbon dioxide (CO2) than human activity; in particular that submarine volcanoes emit large amounts of CO2 and that the influence of the gases from these volcanoes on the Earth's climate is under-represented in climate models.[41][42][43] The United States Geological Survey has calculated that human emissions of CO2 are about 130 times larger than volcanic emissions, including submarine emissions.[44][45][46] The United States Environmental Protection Agency (EPA) stated that Plimer's claim "has no factual basis."[47] This was confirmed in a 2011 survey published in the Eos journal of the American Geophysical Union, which found that anthropogenic emissions of CO2 are 135 times larger than those from all volcanoes on Earth.[48]
