migtig
aka Mrs. Giant
well, that's what I think of with this news article:
"Radioactive-Looking" Sinkholes | NBC 10 Philadelphia
Philadelphia Water Department spokeswoman Laura Copeland tells NBC10.com that the green-looking fluid is actually a “harmless, food dye” used as a tracer. It helps workers identify the cause of sinkholes, cave-ins and other holes in the ground.
"Radioactive-Looking" Sinkholes | NBC 10 Philadelphia
Philadelphia Water Department spokeswoman Laura Copeland tells NBC10.com that the green-looking fluid is actually a “harmless, food dye” used as a tracer. It helps workers identify the cause of sinkholes, cave-ins and other holes in the ground.