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Science 30 June 2006:
Vol. 312. no. 5782, pp. 1889 - 1890
DOI: 10.1126/science.1129913
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Perspectives

ECOLOGY:
Climate Change and Crop Yields: Beyond Cassandra

David Schimel

An analysis of recent data from a wide variety of field experiments suggests that previous studies overestimated the positive effects of higher carbon dioxide concentrations on crop yields.

The author is in the Climate and Global Dynamics Division, National Center for Atmospheric Research, Boulder, CO 80307, USA. E-mail: schimel{at}ucar.edu

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