Milton Becerra was also invited by Alfons Hug, coordinator of the collective exhibition "Art Amazon", organized by Germany's Goethe Institute during the first United Nations Conference on Environment and Development Earth Summit, ECO-92), at the Museum of Modern Art in Rio de Janeiro. For that exhibition he focused on the Upper Orinoco River, the Amazon Federal Reserve, the Yanomamo territory, and he immersed himself into an experiment, as a fully anthropological workshop, developing the theme "Xawara Yanomami – XXI Century". Between 1992–1994 the sample was presented at the Museum of Art in Brasilia, Brazil; the Ludwig Museum of Art Forum International, Aachen, Germany; Technische Sammlungen, Dresden, Germany; and Statliche Kunsthalle, in Berlin, Germany.