The mystery was solved with the fluorescent waters in the grand canal of Venice, as authorities concluded it was due to a “tracer”, i.e. a liquid introduced to detect a contaminated water leak.

Last Monday, the residents were surprised to see the waters change in bright green colorwhich according to the authorities is due to “fluorescein”, a substance used to control sewage networks.

The Regional Agency for the Prevention and Protection of the Environment of Venice (Arpav), said that the results “did not show the presence of toxic elements in the samples analyzed”, without, however, clarifying who threw the substance into the waters of the canal.

The prefect Di Barry, in agreement with Dean Michele Masciopinto, ordered the intensification of surveillance in the lagoon area in order to avoid further similar incidents.

However, this is not the first time that the Grand Canal has turned green. In 1968, Argentinian artist Nicolas Garcia Uriburu painted the waters of Venice’s Grand Canal green with a fluorescent dye during the 34th Venice Biennale to promote ecological awareness.