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Science 1 November 2002:
Vol. 298. no. 5595, p. 919
DOI: 10.1126/science.298.5595.919a
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This Week in Science

A new assessment of the number of plant species threatened by human activity, by Pitman et al. (p. 989), indicates that at least 30% of all plant species are at risk of extinction this century.




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