The fire department in Italy has announced that the waters of the main canal in Venice turned bright green on Sunday in the area near the Rialto Bridge, and authorities are trying to determine the cause. The department tweeted that the regional environmental protection agency has taken samples of the discolored water and is working to identify the substance that changed the water's color. The Italian news agency ANSA reported that the governor of Venice has called for an emergency meeting with police forces to understand what happened and explore potential measures to address it. This incident reflects recent actions in Italy, where environmental groups have colored historical landmarks, including using charcoal to turn the waters of the Trevi Fountain in Rome black in protest against fossil fuel usage. However, unlike previous cases, no environmental group has claimed responsibility for what happened in Venice.