Revised global historic fossil-fuel CO2 emissions estimates are now
available through CDIAC's Trends Online series
(http://cdiac.esd.ornl.gov/trends/emis/tre_glob.htm). The revised
pre-1950 estimates are based on energy production and trade (imports
and exports) data rather than production data only, and extend back to
1751. The emissions estimates from Marland et al. and NDP006 agree
well over comparable time periods but users are encouraged to access
the data through Trends Online. There are no plans to ever produce any
updates to NDP006.
The documentation file for NDP-006: Carbon Dioxide Production from Fossil Fuels
and Cement, 1860-1982, is ndp006.txt.