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Published online 14 March 2003 | Nature | doi:10.1038/030310
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Bubbles prompt climate-change rethink
Argon traces hint that carbon dioxide did not lead life out of the freezer, but followed.
Carbon dioxide certainly warms our planet, but it might not turn on the heat, reveals a new analysis of ancient Antarctic ice.
"Our data suggest that the warming came first, then carbon dioxide increased," says Jean Jouzel of the Pierre-Simon Laplace Institute in Gif-sur-Yvette, France1.
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