The green sludge in NYC is captivating people online, but it's not the first time. Here are 4 other times the lime-colored slime baffled onlookers.

In 2017, mysterious green sludge caused lane closures and impacted traffic when officials discovered it along a Michigan interstate.

Related Keywords

Manhattan ,New York ,United States ,Toronto ,Ontario ,Canada ,Great Lakes ,Michigan ,Nick Caruso ,Dan Pantelo ,Richard Johnston ,Maria Noyen ,Jilla Greenberg ,National Institute Of Environmental Health Sciences ,Instagram ,World Trade Center ,Port Authority ,New York Times ,Michigan Department Of Environment ,New York City ,Community Notes ,Wall Street ,New Yorkers ,Street Herald Square ,Michigan Department ,National Institute ,Environmental Health ,News Toronto ,Daily Mail ,Green Slime ,Green Liquid ,Green Dye ,Michigan Highway ,Insider ,