Arnwyn said:
- and, again: power? running water? blenders and smoothies?
Solar cells, wind/wave turbines + batteries and inverters = self-renewing electricity. Turn on the inverters, and you can run a blender, a light, a stereo, a refrigerator/freezer, or whatever else you need (with a bank of inverters, or one really big one). Eventually, you'll have to rebuild (or otherwise replace) the batteries, but desulphating the plates isn't that hard, and with some metal and a saw, you could always make more, when they wear out. The other component parts are basically reusable. In fact, you can make a battery of sea water, pennies, and nickles...
Running water is also no problem. It rains on the island, every day. Collect the water in a tank (easy, since you're underground), microfilter it (or distill it and condense the steam, if need be), and store it. The plumbing's not that hard.
Also, there may be a nuclear power plant providing more than enough energy and waste heat, so that the solar cells or turbines, batteries, and inverters aren't even needed. There could even be a "farm" of several banks of wave-turbines connected to the end of that cable that Sayid found...
Nothing within the "survival shelter" is beyond the limits of 1970s technology, with a large budget, except the food (sorry, but the shelf-life of food just isn't up to 30 years)!
Of course, all of this presupposes that there are no supplies being delivered, and that there's no "growing rooms" down there that use sunlamps (or somesuch) to grow food, too!
