Overpopulation is a problem because:
(a) it is difficult to limit human growth
(b) Earth's carrying capacity may have already been surpassed (c) governments lack the courage to take a stand on population growth (d) humans have yet to experience any ef-fects of their pollution of the environment
Question 2
Ecosystems are inherently:
(a) stable (b) cumulative (c) unstable (d) energetic