News of the WeekU.S. ENVIRONMENT

Report Takes Stock of Knowns and Unknowns

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Science  27 Sep 2002:
Vol. 297, Issue 5590, pp. 2191
DOI: 10.1126/science.297.5590.2191a

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The United States spends more than $120 billion a year on protecting ecosystems, but the information used to evaluate such efforts is often inadequate or of questionable relevance, say ecologists and policy experts. A new report tries to provide the missing data and point out where better measures are needed. But half of its "ecosystem indicators" can't be measured yet.