The Sky's the Limit
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Scan day: 07 February 2014 UTC
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Description: Assigning an economic value to the world's ecosystems. From the Why Files.
What's the worth of the Earth? According to Robert Costanza of the University of Maryland it's about $33 trillion. That, at least, is the average annual value of "natural capital" and the services provided by the world's ecosystems, says Costanza whose calculations were published in the May 15 issue of the journal Nature.
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