'Poor crowded' diaporamas de présentation

Chapter 21, Section 2: An Age of Cities

Chapter 21, Section 2: An Age of Cities. Main Idea: Vast numbers of people migrated to cities, changing urban landscapes and creating new problems. City Populations Boom. In 1860, less than 20% of Americans lived in a city. By 1890, 33%. By 1920, over 50%. Causes of City Growth (Urbanization)

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