Four Things You Need to Survive a Long-Term Crisis: Food
Credit: Photograph by Michael Friberg

"Figure on 2,400 calories per person per day, minimum. People think, 'Man, I have this whole room full of food, a year's supply.' Then we take our calculators out and say, 'No, you have seven months' worth.' I have never found preppers who've underestimated their food supply – they always overestimate."