to be in the range of US$16-54 trillion (1012)
per year, with an average of US$33 trillion
per year. Because of the nature of the uncertainties, this must be considered a minimum estimate. Global gross national product total is around US$18 trillion
per year."
Dr. Costanza is the Gordon and Lulie Gund Professor of Ecological Economics and director of the Gund Institute for Ecological Economics at the University
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