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The Department of Energy's Carbon Dioxide Information Analysis Center (CDIAC) provides CO2 -related data in the form of numeric data packages (NDPs) to researchers and policymakers. During compilation of these NDPs, CDIAC thoroughly checks the data and interacts with the contributing researchers and agencies to ensure greater understanding and proper interpretation of the data. During the compilation of a recent NDP, CDIAC collaborated with the United Nations (UN) Energy Statistics Unit to ensure the quality of the UN Energy Data Base. This data base, with more than 310,000 records and 2,000,000 data values, consists of detailed energy production and consumption estimates for all countries from 1950 to 1986. It is essential to the CO2 research program to estimate and predict CO2 emission rates. The resulting data base developed by CDIAC containing global and national CO2 emission estimates shows that the amount of CO2 produced globally from fossil fuel burning and cement manufacturing has risen significantly since 1950. The 1986 global emission estimate of 5.5 gigatons of carbon represents a 4.1% increase over the rate in 1985. 14 refs., 4 figs., 1 tabs. (ERA citation 14:009163)