Theologian and philosopher Leonardo Boff told an audience at the Federal University of Santa Catarina (UFSC) that the oceans are turning into a “human sewer,” urging coordinated global action to curb pollution and climate risks. Boff spoke after a lecture at the Planeta DOC event, which hosted discussions and documentary screenings focused on environmental issues. Boff said the scale of marine waste is unacceptable, citing vast accumulations of floating debris. Oceans Are Becoming Humanity’s Sewer, Leonardo Boff Warns at UFSCHe highlighted the exposure of low-lying urban areas, using Rio de Janeiro’s flat coastal plain as an example of potential inundation if rising seas advance inland. Boff called for tackling root causes, including high waste generation and pollution, which he linked to broader drivers of climate change.