There's a company in London that, deep underground in old abandoned tunnels, is growing fresh food. Imagine Metro 2033, then, only with fresh lettuce.
Fast Company say that the company, Zero Carbon Food, has 2.5 acres of space 100 feet underneath the Underground's Northern Line, where they grow pea shoots, rocket, broccoli, mustard leaf and basil.
It's hard picking out the best part of all this. The use of space is neat, but growing the food underground also means there's no pests flying around, meaning they don't need to use chemicals on the produce.
The next time you see some post-apocalyptic media, and everyone's fighting over old soup cans, remember that a fresh salad is way better for you.