What is the approximate amount of the annual net primary productivity of the whole biosphere?
A. 80 million tons of organic matter
B. 170 billion tons of organic matter
C. 10 billion tons of organic matter
D. 2 million tons of organic matter
Answer:B
What is the approximate amount of the annual net primary productivity of the whole biosphere?
A. 80 million tons of organic matter B. 170 billion tons of organic matter C. 10 billion tons of organic matter D. 2 million tons of organic matter