Regulations lag pace of climate change. Air pollution kills 860,000 people each year
The waters in Venice's main canal turned fluorescent green on Sunday in the area near the Rialto bridge and authorities are seeking to trace the cause, Italy's fire department said.
The regional environmental protection agency has received samples of the altered waters and is working to identify the substance that changed their colour, the department said in a tweet.
The Venice prefect has called an emergency meeting of police forces to understand what happened and study possible countermeasures, the Ansa news agency reported.
The incident echoes recent episodes in Italy where environmental groups have been colouring monuments, including using vegetable charcoal to turn the waters of Rome's Trevi fountain black in a protest against fossil fuels.
However, unlike previous cases, no activist group has come forward to claim responsibility for what happened in Venice.
Regulations lag pace of climate change. Air pollution kills 860,000 people each year
The two Muslim neighbours were involved in unprecedented tit-for-tat military strikes this year
Attacks online include insults, sexist and sexual comments, and physical threats, including death threats to journalists and their families
AI tools imitating human intelligence are widely used in newsrooms around the world to transcribe sound files, summarise texts and translate
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It allows American spy agencies to surveil foreigners abroad using data drawn from US digital infrastructure such as internet service providers
The incident happened shortly after jury selection for the hush-money trial was completed
The neighbourhood around the consulate was closed after the 60-year-old entered the premises, claiming to be armed with an explosive vest