An In-depth Interview with the Fed's Leading Researcher on Coal Tar Sealers
Here's a rare glimpse into the timeline of the research accomplished the USGS on this topic, which was conducted by the University of Illinois Extension which offers "educational programs to residents of all of Illinois’ 102 counties – and far beyond."
Amazingly, it affects every man, woman and child in Illinois, but most have no idea. Thanks to the Extension for putting it out!
Here are the interviewers with Dr. Mahler as they developed their story: