Fuel:
Fuel runs every tool we use. Even our manual tools use human effort and that requires food for fuel.
Loss of infrastructure would block access to most of the fuels we commonly use. Electricity runs the banks (payment), gas pumps (transportation) and stores that sell batteries making energy backup a major concern. Most energy we use has limited shelf life or is dependent on a fragile distribution system. Gasolene only keeps about three months without stabilizer and just under a year when carefully stored in an underground steel drum with stabilizer added. Diesel is a little better but can be fouled with bacteria. Propane is one of the best fuels because it never goes bad but storage of large quantities is cumbersome and not replaceable if the trucks can't deliver more.
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