In this photo, Perry Gray-Reneberg is observing the Living Machine at Berea College. He believes, “Sustainable living calls us to choose, today, for the consequences of our choices to be a blessing, not a curse, on our descendants.”
Regarding a Monolithic Dome’s super insulation, Perry wrote, “…three of the four structural dome construction materials — Airform, polyurethane and concrete (excluding rebar) — serve to isolate the dome’s internal environment from the outdoors.”






