The city skyline can be seen though the masts of ships early Tuesday morning at Burnham Harbor in Chicago. Today the Illinois Partners for Clean Air and Illinois Environmental Protection Agency issued an Air Pollution Action Day Alert to individuals businesses in the Chicago Metropolitan area. The air pollution levels are expected to reach the "Orange" or "Unhealthy for Sensitive Groups" category on t national Air Quality Index, the first Action Day issued for 2013.
Anthony Souffle, Chicago Tribune
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