Since Malthus's time, the carrying capacity of the human population has greatly increased, but most ecologists do not think this increase can be sustained.If the human carrying capacity levels off or declines, this change will most likely occur because humans have
A) used up all the living space available on Earth.
B) seriously degraded Earth's life-support systems.
C) reached a genetic maximum in population growth rate.
D) lost the intellectual ability to make technological advances.
E) failed to provide housing and health care for the existing population.
Correct Answer:
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