Watch Online HD on HDtoday. Ailton Krenak, indigenous leader and thinker, talks about the pain of the Watú (or Rio Doce in the Krenak language). Sick with the biggest environmental disaster in Brazilian history, the Mariana Dam disaster, the river asks for help. From the impacts on his village on the banks of the river, he makes an overview of the current Anthropocene period and invites all human beings to a journey of reflection and self-criticism, aiming at urgent but necessary paradigm shifts.