The population explodes.
D000569:Americas; D003247:Conservation of Natural Resources; D019049:Developed Countries; D004777:Environment; D005069:Evaluation Studies as Topic; D009656:North America; D011057:Politics; D011156:Population Density; D014481:United States
Americas; Carrying Capacity; Critique; Developed Countries; Environment; Natural Resources; North America; Northern America; Overpopulation; Political Factors; United States