"Biosphere II" offers unique conditions worldwide. "In the first years, the biodiversity in the system had rapidly reduced. Now, 30 years later, we have a stable population," says John R. Adams, who heads "Biosphere II" on behalf of the University of Arizona, in the short film. For researchers, this means: they can create specific conditions in the system and observe how the ecosystem reacts to them. The goal is to make findings that will allow them to anticipate, for example, the climatic conditions that will prevail on the plant in 30 years' time.