Refer to the figure.
This figure is of the global carbon cycle. (Note: Boxes represent major pools of C, measured in petagrams [1 Pg = 1015 g]. Arrows represent major fluxes of C, measured in Pg per year; anthropogenic fluxes are shown in orange.)What is the net flux of carbon to the atmosphere?
A) ‒4 Pg
B) 1.7 Pg
C) 6.4 Pg
D) 8.7 Pg