Riccardo Dalisi’s research in “decrease” starts from the thoughts of Friedensreich Hundertwasser, an Austrian painter, architect, ecologist and sculptor, that foresaw some concepts of bioarchitecture. Dalisi develops the concept of “decrease”: a philosophy, a guideline, an attention to the architectural and design project that he explains with written materials, images, illustrations and objects made with discarded materials by himself and by his students. Dalisi’s solution to the ecological collapse is not only energy saving but above all the correct proportion between human and natural space, the rebirth of architecture and also a new attention to everything that is wrongly considered waste. “it’s been more than 20years from Friedensreich Hundertwasser pleaded for a greater sensitivity to nature, an attention that is very much similar to what we want to concretise here”. Riccardo Dalisi Riccardo Dalisi was born in Potenza and now lives in Naples. This city has become his headquarter for different troops. The first troop is marching towards architecture with projects and awards. A second troop, headed by Totò and Pulcinella and called “Opera buffa del design”, march towards design. A third troop is in the sculpture world with warriors, swords, spears, Virgins with or without Child. A fourth troop is equipped with brushes and drawing pens with fighting colors that melt, drop and play freely. A fifth troop is composed by puppets and dolls that create entire populations and many other things. A sixth troop is writing made by rambling words, marks and signs. He is now old but he carries on his social mission started with street children of rione Traiano (1971-1975), followed by the elderly of Ponticelli (1977) and now arrived to rione Sanità with the workshop “Progettazione e compassione”.