According to the researchers, what is the average price tag of these fundamental ecosystem services?
A. US $ 300 trillion a year
B. US $ 33 trillion a year
C. US $ 5 trillion a year
D. US $ 1000 trillion a year
Answer:C
According to the researchers, what is the average price tag of these fundamental ecosystem services?
A. US $ 300 trillion a year B. US $ 33 trillion a year C. US $ 5 trillion a year D. US $ 1000 trillion a year