Chicago's Mayor Richard Daley (left), activates the nation's first continuous, automatic telemetering network for air pollution control. The air monitoring network has eight stations throughout the city which report data to this console. The system can be expanded to handle 75 remote stations. With Daley is William Stanley(pointing), Deputy Director of Chicago Air Pollution Controland James Fitzpatrick, Director. (Photo by Bettmann Archive/Getty Images)
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May 12th, 2020
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