Some agricultural sub-Saharan nations of Africa have over-farmed and overgrazed their land to the extent that significant portions of it have turned into desert.This suggests that:
A)the concavity of the production possibilities curves of such nations has increased.
B)the production possibilities curves of such nations have shifted inward.
C)the production possibilities curves of such nations have shifted outward.
D)these nations are operating at some point outside of their production possibilities curves.

Question

Quizplus · Accepted Answer

Over-farming and overgrazing lead to soil degradation, which in turn reduces land productivity and limits the types of crops that can be grown. This results in a shift inward of the production possibilities curve, as the economy can no longer produce the same level of output as before.

Some Agricultural Sub-Saharan Nations of Africa Have Over-Farmed and Overgrazed