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.
Different locations present different climactic challenges, which you’ll want to factor into your survival-kit-making decisions. Trips through the northern reaches of the globe, for example, will force you to confront very cold temperatures. This may make things like emergency hand warmers and hot chocolate important in your survival kit. By contrast, you’ll want to prepare for heat stroke, snake bite, and torrential rain if you are hiking or camping in the tropics.
The kind of gear you need – It’s easy to get obsessed with survival gear and start accumulating every new product that comes on the market. If you have money to burn and engage in a variety of backcountry activities this might be a sound strategy. Most people however decide pretty early on what type of outdoor activity floats their particular boat and as such any survival gear should have some sort of relationship to that activity. Everyone, for instance, should have an emergency whistle with them but not everyone will need an extreme sleeping bag. Everyone will need first aid items but not everyone will need to carry croval shovel or a tactical watch or field watch. If you’re a mountaineer you’ll probably want that shovel, especially if you’re climbing in the winter. If you’re going on a day hike and aren’t bringing food that requires preparation there’s no need for a mess kit and so on.
Mainstream economist and financial adviser Barton Biggs is a proponent of preparedness. In his 2008 book Wealth, War and Wisdom, Biggs has a gloomy outlook for the economic future, and suggests that investors take survivalist measures. In the book, Biggs recommends that his readers should "assume the possibility of a breakdown of the civilized infrastructure." He goes so far as to recommend setting up survival retreats: "Your safe haven must be self-sufficient and capable of growing some kind of food," Mr. Biggs writes. "It should be well-stocked with seed, fertilizer, canned food, medicine, clothes, etc. Think Swiss Family Robinson. Even in America and Europe, there could be moments of riot and rebellion when law and order temporarily completely breaks down."
A survival kit should be considered mandatory equipment for any outdoor enthusiast. You never know when something will go wrong, placing your very life will be in danger. But, if you have a well-conceived survival kit with you, your odds of survival will improve greatly. However, it is important to understand those different people will require different types of equipment in their survival kit, and you must customize your kit to suit your specific needs and the circumstances you’ll likely face. This means you’ll probably want to avoid purchasing a pre-assembled kit, and instead put together your own. Below, we’ll explain some of the most important items to pack in a survival kit, as well as the things you’ll want to consider when assembling your items.
Zombie apocalypse: Used by some preppers as a tongue-in-cheek metaphor for any natural or man-made disaster and "a clever way of drawing people’s attention to disaster preparedness". The premise of the Zombie Squad is that "if you are prepared for a scenario where the walking corpses of your family and neighbors are trying to eat you alive, you will be prepared for almost anything." Though "there are some... who are seriously preparing for a zombie attack".
A quality hatchet can be a true lifesaver when it comes to building shelters and processing firewood in a wilderness survival setting. And it’s darn handy when you’re just camping in the local woods, too. Designed by Vietnam veteran Elmer Roush, the new CRKT Pack Axe is a tiny titan. Tipping the scales at a bantam weight of only 1.14 pounds, and less than a foot long, even the gram-conscious minimalists have to take notice. This beautifully built camp axe is made with 1060 carbon steel that is hot forged into very durable blade. It also has the bonus of a hammer poll (for pounding in stakes and such). Tennessee hickory is the wood of choice used for the hatchet handle, and it comes lacquer coated for a longer lifespan. If you’re looking for small axe that can tackle big jobs, check this one out. But don’t freak out when it arrives: it does not come with a sheath. You’ll have to provide your own. After all, it’s Columbia River Knife and Tool (CRKT), not Columbia River Knife and Tool and Leather Works (CRKTLW). I’m sure you needed to practice your leather work anyway. It should also be known that 10 percent of the profits on this tool go to the Green Beret Foundation. Way to go, CRKT!
Float Bag – If your adventures will take place on or near the water, it is a good idea to pack your survival kit in a float bag/waterproof bag, so you can prevent it from sinking to the bottom. Often, it will make the most sense to store your survival kit in a small carrying case, which is then placed inside a float bag, but you could just use the float bag if you prefer.
We get that creature comforts will be ever more important as the things that used to make us happy slowly break and crumble around us. But do you really want to put a ton of effort into opening a bakery when everything is going to shit? And we hate to be the bearers of bad news, but no amount of odor elimination is going to stop the uncivilized world from smelling really, really bad.
Doug Huffman is prepared, teaching techniques for surviving a second depression based upon America's massive debts.; Dianne and Greg Rogers, dedicated parents in Canada, are concerned with future events affecting their home-life; Ed and Dianna Peden ("still living in the 60's"), of Topeka, Kansas are preparing to survive fully underground in their decommissioned Atlas missile silo when doomsday arrives.
Another concern when you’re lost in the wild is where to procure potable water. Sometimes there will be bubbling streams of crystal clear water rolling down wooded hillsides to fill your water bottle and sometimes you’ll have little more than a stagnant pool standing between you and dehydration. The LifeStraw Personal Water Filter is survival gear that can turn that stagnant pool into a lifesaver.
When bands of marauders start roaming the streets, how are you going to keep them out? Tear down a few walls, says Timothy Ferraro, a twenty-five-year construction veteran who's thought about this situation plenty while watching The Walking Dead. "Assuming the attackers don't have a battering ram, you should be able to keep them out using the lumber and drywall already in your home," he says.