I was real interested in them when the actual Biosphere was starting the early 90's, but it ended up closing early and being a non-event. I believe this is the way we will end up on other planets, which is something I really want to see before I die. Interesting concept, and viable with the right research.

As for the UN supporting anything, screw them. If we go to other planets and build biospheres or anythign else, it should be for Americans, by Americans and screw everyone else. We can move right the hell off of this planet and give the UN anything they want... on Earth.