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Science 11 January 2008:
Vol. 319. no. 5860, p. 153
DOI: 10.1126/science.319.5860.153b
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News Focus

AMERICAN GEOPHYSICAL UNION MEETING:
Climate Tipping Points Come In From the Cold

Richard A. Kerr

A nearly packed half-day session at the American Geophysical Union meeting, held in San Francisco, California, from 10 to 14 December 2007, considered the prospects for a climate system that is still creeping through change but might soon cross a threshold into an entirely new way of operating.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)