Technological innovation and population pressure.
D000383:Agriculture; D000569:Americas; D003247:Conservation of Natural Resources; D003710:Demography; D019049:Developed Countries; D004467:Economics; D004777:Environment; D009656:North America; D011153:Population; D011157:Population Dynamics; D012939:Social Planning; D012942:Social Sciences; D014481:United States
Agricultural Development; Americas; Carrying Capacity; Demographic Factors; Demography; Developed Countries; Economic Factors; Environment; Historical Demography; Natural Resources; North America; Northern America; Population; Population Dynamics; Population Pressure; Population Theory; Rural Development; Social Sciences; United States