states; the American population was 4th in the world (behind Russia, France, Austria). * Urban growth continued explosively. * In 1790, only New York & Philadelphia had more than 20,000 people, but by 1860, 43 cities had. * With growth came poor sanitation ‡ later, sewage systems and piped-in water came about. 2. A high birthrate had accounted for population growth, but near 1850s, millions of Irish and German came. * They came due to a surplus population in Europe…
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