But today it is the more than 6.6 billion people that are destroying nature at an unprecedented pace. They hunt and fish at uncontrolled rates
You're a banker. So tell me, why are some things worth something while others are not?" While searching for an answer to her question, he hit upon the idea of calculating prices for forests, wetlands and the courses of rivers.
In 1997, American ecological economist Robert Costanza estimated the annual value of the services nature provides for mankind at $33 trillion, a figure that was 1.8 times the world GNP at the time.
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