Unsustainable Population Increase
Immigration into the United States fluctuated throughout the 20th century because of varying economic conditions. But the changes made by the Immigration Reform and Control Act of 1986 drastically increased the number of immigrants allowed into the United States. The chart below depicts the increase in population per decade during the 20th century with a brief description below of how immigration numbers affected the growth.
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Decades of the Great Wave of Immigration
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1900-1910
The Great Wave of Immigration began in 1880 but exploded into peak numbers during the first decade of the century. The massive numbers of immigrants reached a cumulative total that began to substantially change the character of the entire country from one primarily of towns and farms into one of densely packed urban centers. This decade saw more growth than any previous decade in U.S. history. The rapid population growth destroyed huge sections of the country's once bountiful natural resources, leading to the establishment of the federal parks system and other preservation programs.
https://www.numbersusa.com/problems/unsustainable-population-increase
