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Undertoad · 01-05-2011, 06:01 PM

The followup story says they figured out it was something called Fluorescein, which is not very harmful and was used several years in the 60s to color the rivers green in Chicago on St. Patty's Day.

01-05-2011, 06:01 PM	#22
Undertoad Radical Centrist Join Date: Jan 2001 Location: Cottage of Prussia Posts: 31,423	The followup story says they figured out it was something called Fluorescein, which is not very harmful and was used several years in the 60s to color the rivers green in Chicago on St. Patty's Day.