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Officials in Italy said they have solved the mystery of what turned the waterways in the historic Venice Canal a bright shade of green.
Venice residents reported on Sunday that the waters in the canal stretching to the Rialto Bridgehad had transformed to a fluorescent green color, prompting a police investigation.
Environmental authorities conducted chemical and biological tests on the water and discovered the bright green color was the result of the presence of fluorescein, a non-toxic substance used to test wastewater networks, according to a press release by the Regional Agency for Environmental Prevention and Protection of Veneto.
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