 Since its inception, Allen has served as Chairman of GEC.Despite the criticism that led to Allen’s ouster, Biosphere 2 and its initial two-year experiment remains a significant scientific accomplishment, proving the viability of humans living in a man-made, fully recycling ecological system.A wealth of scientific results are available on the findings of the project, including a compendium of research papers published in the journal Ecological Engineering and reprinted in the book "Biosphere 2 Research Past and Present".