At about 25 minutes 18 seconds into the pseudo-documentary, the video/film shows an animated cartoon of a volcano and asserts that volcanoes emit more carbon dioxide than human induced emissions. The exact quote from the pseudo-documentary is:
âVolcanoes produce more CO2 each year than all the factories and cars and planes and other sources of man-made carbon dioxide put together.â
Once again the pseudo-documentary willfully falsifies the facts. The following quote is from the U. S. Geological Survey.
http://volcanoes.usgs.gov/Hazards/What/VolGas/volgas.html
Comparison of CO2 emissions from volcanoes vs. human activities.
âScientists have calculated that volcanoes emit between about 130-230 million tonnes (145-255 million tons) of CO2 into the atmosphere every year (Gerlach, 1999, 1991). 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 27 billion tonnes per year (30 billion tons) [ ( Marland, et al., 2006) - The reference gives the amount of released carbon (C), rather than CO2, through 2003.]. Human activities release more than 130 times the amount of CO2 emitted by volcanoes--the equivalent of more than 8,000 additional volcanoes like Kilauea (Kilauea emits about 3.3 million tonnes/year)! (Gerlach et. al., 2002)â
Also, from a paper presented at the Geological Society of Americaâs 2010 meeting:
âThis anthropogenic CO2 emission rate is ~100-300 times larger than the estimate ranges for annual global volcanic CO2 release.â
http://gsa.confex.com/gsa/2010AM/finalprogram/abstract_178855.htm
The graph above was originally posted at
http://www.skepticalscience.com/volcanoes-and-global-warming-intermediate.htm The graph shows the atmospheric concentration of Carbon Dioxide as measured at Mauna Loa, Hawaii vs. Stratospheric Aerosol concentrations from volcanic eruptions.
Q. If volcanoes were the primary contributor to atmospheric carbon dioxide, why arenât there spikes in the atmospheric CO2 concentrations that correspond with major volcanic eruptions?
A. As per usual, the Global Warming Deniers lie about reality.
(Note: The 1980 eruption of Mt. St. Helens caused barely a minor bump in aerosols.)