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Science 9 March 2007:
Vol. 315. no. 5817, p. 1371
DOI: 10.1126/science.1139585
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Policy Forum

CLIMATE CHANGE:
CO2 Arithmetic

Wallace S. Broecker

Strict emission limits will be necessary if the rise in atmospheric carbon dioxide is to be stemmed.

The author is at the Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY 10964-8000, USA. E-mail: broecker{at}ldeo.columbia.edu

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A new global deal on climate change.
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Soil Science and the Carbon Civilization.
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