of the science ye naysayers....
http://www.newscientist.com/article.ns?id=dn8369&print=trueRecord ice core reveals Earth's ancient atmosphere
19:00 24 November 2005
NewScientist.com news service
David L Chandler
A thin cut of the ice core shows the dark bubbles of ancient atmosphere, trapped in dark bubbles between ice grains
Drill head and ice core from a depth of 2874 metres - this section was drilled in November 2002
The longest ice-core record of climate history ever obtained has hugely extended the detailed history of Earth's atmosphere, and shows that levels of greenhouse gases really do march in lockstep with changes in temperature.