![Photo of Pollution](https://image.pbs.org/bento3-prod/test-milwaukeepbs/Making%20of%20Milwaukee/Image%20Library%20Other/315daa4158_Other_01_MPL_Pollution_05101.jpg)
Source: Milwaukee Public Library
Source: Milwaukee Public Library
Source: Tom Casper
Source: Milwaukee County Historical Society
Source: Library of Congress
Source: Milwaukee County Historical Society
Source: Milwaukee County Historical Society
Source: Milwaukee County Historical Society
Source: Milwaukee County Historical Society
Source: Milwaukee County Historical Society
Source: Milwaukee County Historical Society
Source: Milwaukee County Historical Society
Source: Milwaukee County Historical Society
Source: Milwaukee County Historical Society
Source: Milwaukee County Historical Society
Source: Milwaukee County Historical Society
Source: Milwaukee County Historical Society
Source: Milwaukee County Historical Society
Source: Milwaukee County Historical Society
Source: Milwaukee County Historical Society
Source: Milwaukee County Historical Society
Source: Milwaukee County Historical Society
Source: Milwaukee County Historical Society
Source: Milwaukee County Historical Society
Source: Milwaukee County Historical Society
Source: Milwaukee County Historical Society
Source: Milwaukee County Historical Society
Source: Milwaukee County Historical Society
Source: Milwaukee County Historical Society
Source: Milwaukee County Historical Society
Source: Milwaukee County Historical Society
Source: Milwaukee County Historical Society
Source: Milwaukee County Historical Society
Source: Milwaukee County Historical Society
Source: Milwaukee County Historical Society
Source: Milwaukee County Historical Society
Source: Milwaukee County Historical Society
Source: Milwaukee County Historical Society
Source: Milwaukee County Historical Society
Source: Milwaukee County Historical Society
Source: Milwaukee County Historical Society
Source: Milwaukee County Historical Society
Source: Milwaukee County Historical Society
Source: Milwaukee County Historical Society
Source: Milwaukee County Historical Society
Source: Milwaukee County Historical Society
Source: Milwaukee County Historical Society
Source: Milwaukee County Historical Society
Source: Milwaukee County Historical Society
Source: Milwaukee County Historical Society
Source: Milwaukee County Historical Society
Source: Milwaukee County Historical Society
Source: Milwaukee County Historical Society
Source: Milwaukee County Historical Society
Source: Milwaukee County Historical Society
Source: Milwaukee County Historical Society
Source: Milwaukee County Historical Society
Source: Milwaukee County Historical Society
Source: Milwaukee County Historical Society
Source: Milwaukee County Historical Society
Source: Milwaukee Journal Sentinel
no source
no source
Source: Milwaukee County Historical Society
Source: Milwaukee County Historical Society
Source: Milwaukee County Historical Society
Source: Wisconsin Energy