29. CO2 vs temperature plot. Smooth CO2 curve does not correlate except in general with actual temperature over250 years history. Note CO2 starts rising prior to Little Ice Age. CO2 data drom Keeling, C.D., and T.P. Whorf. 1996. Atmospheric CO2 records from sites in the SIO air sampling network. In Trends: A Compendium of Data on Global Change. Carbon Dioxide Information Analysis Center, Oak Ridge National Laboratory, Oak Ridge, Tenn., U.S.A.