For global catastrophic risks the costs of food storage become impractical for most of the population  and for some such catastrophes conventional agriculture would not function due to the loss of a large fraction of sunlight (e.g. during nuclear winter or a supervolcano). In such situations, alternative food is necessary, which is converting natural gas and wood fiber to human edible food.
I feel like a lot of people worry about stockpiling food because if their house floods, a tornado, or some other major disaster their food would be gone with it. I feel like stockpiling is important to help with some less “threatening” emergencies… such as loss of job. My dad was without a job for 11 months, and with 8 kids my parents lived off our food storage during that time. I didn’t even realize that’s what we were doing because we kept eating the same food we always had. When stockpiling it is important to buy what you will use on a daily basis… then it will save you money to!
I don’t own very many of the items on this list. Some of the items I own smaller, more cost-friendly alternatives of, others are way out of my league price point-wise and to attain them would take years. #18 for instance, which you really only would bother to buy if you had an off grid location of your dreams or had your forever-home which you were planning on using to bug in. There are items on this list that are much more attainable, having price points closer to $100.
Another possibility is a pre-fab concrete tornado shelter delivered to your site. They can double as storage sheds in good times, including as pool houses. Google ‘precast concrete storm shelter’ and variations on that. Anything which can stand up to a tornado would stand up to a fair blast. Not ground zero, but if you are worried about nuclear war, you probably don’t live at ground zero.
You know the feeling, and it's a bad one. Suddenly everything in the house goes silent and dark. Power's out. You run outside to see if it's just you, and check your breaker box. Meanwhile you're wondering: How long is it going to be out? A few minutes is one thing. A few hours, even. But if you're without electric for days on end — or longer — the throwback appeal of reading by candlelight quickly loses its charm.
Above ground level, this 4,500 square-foot luxury house, located about 140 miles west of Dallas, has three bedrooms, four-and-a-half bathrooms, commercial-grade kitchen appliances, endless prairie and lake views, and even a private golf putting green. Below grade, there’s a 1,000-square-foot structure with reinforced steel walls, bunks for 12, plus a kitchen, laundry facilities, a periscope so survivors can view whatever remains on the post-apocalypse surface, and two hidden escape hatches. The bunker comes equipped with an NBC (nuclear, biological, chemical) filter system and a hydroponic plant-growing system. Six backup tanks of oxygen, as well as 10 years’ worth of emergency ready-to-eat meals, are included in the sale too.
I wrote a blog on this a couple years ago for the Dallas preppers the place to go is Honeyville. Do the math and figure out protein, carbs, vegetables, and fruit per serving and order case lots. To pull together that much it’ll run you about $3000 and then you’ll have what you need. I parcel mine into tubs two tubs will feed a family of four a balanced diet of 1800 cal per day for a month. (See photo.)