We maintain normal atmospheric pressure in here by a special mixture of Oxygen and...

Fred Miller: [they are in a mini-submarine] We maintain normal atmospheric pressure in here by a special mixture of Oxygen and Helium.
T.R. Hollister: Never mind the scientific lecture, Miller. Just what is this crazy project you dragged me down here to see?
Fred Miller: Mr. Hollister, this project meets the most important challenge of the future.
T.R. Hollister: Never mind the future, just give me the past. And oysters.
T.R. Hollister: There she is!
T.R. Hollister: Where?
Fred Miller: Right there. Dead ahead.
T.R. Hollister: Well, I see where is it, but what is it? It looks like a large onion.
Fred Miller: That's what we call it: "The Green Onion".
T.R. Hollister: $200,000 for an underwater onion?
Fred Miller: It's a house. A completely self sufficient, underwater house.
T.R. Hollister: A house for what? Flounders?
Fred Miller: Underwater living is coming, T.R. It has to. At the present population growth in the predictable future, there'll be one human being for every square foot of land on Earth. Can you imagine what that means? This is your future living space
[he uses his hands to indicate a square foot]
Fred Miller: unless...
[he points to the Green Onion]
T.R. Hollister: Well, people weren't meant to live underwater.
Fred Miller: Or fly, or go to the moon. We can't continue to ignore 71% of the Earth's surface, T.R., just because it's underwater. Wait till you see the inside!