I wish we could build anything underground! We have about 1 1/2 ft of soil then solid bedrock! I would love a root cellar! As much as I would love to be semi prepared with everything, im afraid we won't get there, but having it in the fore front of our thinking puts us way ahead of many many people. And while we may not be totally prepared we can keep an eye out for things we will need and work towards it. I dont expect an apocalypse, but I expect our greedy government to fail us, and thus all of the systems we dont realize how much we rely on. So gardening and raising livestock, making homemade soaps and what nots, will all become the demand. I plan on being a supplier! And then I can barter for what I dont have and can't make. So learning is a very vital start. Knowledge is power! so what you can't buy, you can read about. Books published before 1923 I think, are free on Amazon, and I have several, so learning the ways they got by, will help so much in having things we won't know how to make. Our consumer society has no idea how to make much, we know where to go buy it. So I think that's our best start, if you have the books, whetheryou read them now or wait till you have to, you will be better off! And holistic medicine will be a huge neccesity. We won't have very many dr, educated left if it turns out close to how I see it happening. They won't survive. So having some natural remedies and books on plants, getting seeds and freezing them for that purpose or planting them now so they are ready for hravest and learning how to store and mix them, getting our bodies away from our dependency on pills, and used to God's way of treating us. These are things to think about.