[madhadron]

Biosphere II is worth a visit. They're still running it as a non-isolated research station. The original had several very specific problems (trees need wind to form strong roots, fresh concrete absorbs a lot of oxygen, their crops besides sweet potatos had serious soil nutrient problems, which meant they spent almost all their time desperately subsistence farming). Based on what they did we could run a Biosphere III today pretty well, which means I would call the Biosphere II experiment successful.