How much area of the earth is approximately covered by a terrestrial ecosystem?
A. 50 million km2
B. 1000 million km2
C. 148 million km2
D. 500 million km2
Answer:C
How much area of the earth is approximately covered by a terrestrial ecosystem?
A. 50 million km2 B. 1000 million km2 C. 148 million km2 D. 500 million km2