The original source for carbon dioxide emissions are the estimates of the Carbon Dioxide Information and Analysis Center (CDIAC; Marland et al, 2004). Global, regional, and national annual estimates of CO2 emissions from fossil fuel burning, cement production, and gas flaring have been calculated, some as far back as 1751 and extrapolated back to 1500. These estimates, derived primarily from energy statistics published by the United Nations, were calculated using the methods of Marland and Rotty (1984). Cement production estimates from the U.S. Department of Interior's Bureau of Mines were used to estimate CO2 emitted during cement production. Emissions from gas flaring were derived primarily from U.N. data but were supplemented with data from the U.S. Department of Energy's Energy Information Administration, Rotty (1974), and with a few national estimates provided by G. Marland. Timeseries are regularly updated till current time, see also the Global Carbon Project (http://www.globalcarbonproject.org/)

Please consult the working paper for a description of the data and sources.