Letters

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Science  20 Sep 2002:
Vol. 297, Issue 5589, pp. 1993
DOI: 10.1126/science.297.5589.1993a

Letters in This Issue

Side Effects of Oceanic Iron Fertilization

Mark G. Lawrence

Critical Challenges for Sustainability Science

Rob Swart, Paul Raskin, John Robinson. Response Robert Kates and William C. Clark

Does the Sun Know What Day It Is?

Dave Pilgrim

Making a Case for Conservation

Sidney K. Pierce. Response Donald Kennedy

Corrections and Clarifications

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