On the brink of a federal review, chemicals found in deodorants, lotions and hair conditioners are showing up in Chicago's air at potentially alarming levels

Dredging of a highly contaminated canal has begun to make it deeper for ships, but some experts worry the effort could stir up chemical trouble.

Last year, University of Iowa scientists reported the discovery of a novel contaminant in urban air — a polychlorinated biphenyl, or PCB, that had never been intentionally manufactured.

https://www.chicagotribune.com/news/ct-xpm-2009-01-22-0901200282-story.html