There are many kinds of natural ice found on our planet. These include
glacier ice, ice sheets, cave ice, massive ground ice, ice-wedge ice
and permafrost ice. The problems associated with the recovery and dati
ng of the CO2 and other gases contained in these kinds of ice is revie
wed. New data are presented on various kinds of natural ice. How this
kind of data can be used to help determine the origin and history of n
atural ice samples is discussed, along with the kind of paleoclimatic
information that might be obtained from natural ice samples.