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Nature 417, 112-113 (9 May 2002) | doi:10.1038/417112a

Ecosystem health: The state of the planet

Virginia Gewin1

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More than 2,000 experts will be involved in a four-year effort to survey the health of the world's ecosystems and threats posed by human activities. Virginia Gewin profiles the Millennium Ecosystem Assessment.

In March last year, Harold Mooney scribbled a flow chart on a napkin as he and Walter Reid sat in a Montreal bar. The magnitude of the task they had embarked on was really starting to sink in.