Original data: Marland, G., T.A. Boden, and R. J. Andres. 2003. "Global, Regional, and National CO2 Emissions." In Trends: A Compendium of Data on Global Change. Carbon Dioxide Information Analysis Center, Oak Ridge National Laboratory, U.S. Department of Energy, Oak Ridge, Tenn., U.S.A. http://cdiac.esd.ornl.gov/trends/emis/tre_glob.htmarchive copy at the Wayback Machine]
The data is originally presented in terms of solid (e.g. coal), liquid (e.g. petroleum), gas (i.e. natural gas) fuels, and separate terms for cement production and gas flaring (i.e. natural gas lost during oil and gas mining). In the plotted figure, the gas flaring (the smallest of all categories) was added to the total for natural gas. Note that the carbon dioxide releases from cement production result from the thermal decomposition of limestone into lime, and so technically are not a fossil fuel source.
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The original version of this figure was prepared by Robert A. Rohde from publicly available data, and is incorporated into the Global Warming Art project.
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