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Robert Constanza and his colleagues have shown that ________.

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Robert Constanza and his colleagues have shown that ________.

Robert Constanza and his colleagues have shown that ________.
A) ecosystems services cannot be assigned monetary values because they are external
B) ecosystem services are valued at less than 0.5% of the U.S. GDP
C) NAFTA has had environmental benefits worth $2.7 billion in 2011
D) the value of ecosystem services is more than $45 trillion in 2011 dollars
E) nutrient cycling is the least valuable of ecosystem services

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Essential Environment

Edition: 4^th

Author: Withgott

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