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.
Nygaard is a busy woman: In addition to working a full-time job, raising chickens, and growing sweet corn, potatoes, and peppers, she runs a blog called Living Life in Rural Iowa, where she shares bits of wisdom that she’s learned on her prepping journey. Looking back, Nygaard says becoming a prepper encouraged her to develop new skills, including the sorts of home repairs and outdoor work she once counted on her husband to tackle. “Before you get divorced, you’re like, ‘Oh, that’s outside. My husband can take care of that.’ And then when you become a single parent, you’re like, ‘Wow, I have to do outdoors and indoors — why did I think he should take care of all that?’ You have that sense that you can do just about anything you set your mind to.”
Canned meat: Get about 20 cans of assorted meats. Without refrigeration it will be hard to keep meat from spoiling, and that’s if you can get it in the first place. There are quite a few options, SPAM, Ham, Beef, Chicken, Tuna and sardines, but remember buy what you eat now. Also make sure you have a manual can opener, your electric can opener might not work.
These individuals study End Times prophecy and believe that one of various scenarios might occur in their lifetime. While some Christians (and even people of other religions) believe that the Rapture will follow a period of Tribulation, others believe that the Rapture is imminent and will precede the Tribulation ("Pre-Trib Rapture "). There is a wide range of beliefs and attitudes in this group. They run the gamut from pacifist to armed camp, and from having no food stockpiles (leaving their sustenance up to God's providence) to storing decades' worth of food.
The difference between me and someone else? Imagine if we both lost our jobs at the same time. Realistically, I haven’t got to spend any money. I’ve got a back-up of food supplies to last six months. I haven’t got to buy wood. I haven’t got to turn the taps on, because I’ve stored rain water and filtered it for drinking. I haven’t got to put the heating on, because I have other means of keeping warm at home. I could be unemployed for a while without it impacting me financially. Whereas someone else, they’re thinking: “Shit, I’ve got a month’s wages. I don’t know how long this can go on for.” That’s a kind of prepping in itself.
This past September, Wise Company’s products proved lifesaving in a very urgent sense: Strapped for rations following the double whammy of Harvey in Texas and Irma in South Florida, FEMA placed an order for 2 million servings of food to relieve Maria’s victims in Puerto Rico. On a typical day, though, its selection of 72-hour, one-week, and one-month survival kits, packaged in boxes that can easily fit under a bed, seems more geared toward everyday Americans looking to prepare for the unknown.