Who have recently tried to put price tage on nature's life support services ?

Options

A. Robert Constanza and his colleagues
B. Nile Perch and his colleagus
C. Herbert Boyer and his colleagues
D. Ram Deo Mishra and his colleagues

Answer

A

Explanation

Reseraches have put an average price tag of 33 million dollar a year on the fundamental ecosystem services. This is nearly twice the value of global gross national product [GNP] which is 18 trillio US dollars