The protesters were with Climate Defiance, an advocacy group that has disrupted meetings and speeches in D.C. to bring attention to the climate crisis.
Italian media said the occurrence was reminiscent of when an Argentine artist released colored pigment into the waterway in 1968 to raise ecological awareness.
Deanna "Violet" Maree Coco, who was sentenced to at least eight months in prison for her role in a climate protest on the Sydney Harbour Bridge in April, has been granted bail pending an appeal.
Whether throwing food at art or glueing themselves to streets, climate activists are eschewing large marches in favor of small, bold acts. Some political figures are calling for increased criminalization in response.
Climate protesters who take radical and provocative action risk alienating their allies and repression from authorities, but their tactics can yield significant advantages for their cause.
