Hydroponics

Hydroponics is a way to grow plants without soil. The benefit of using hydroponics is that you can grow fruit and vegetables almost anywhere.

This is great for survival, as it is low cost and you produce your own food - not relying on anybody else. In case in the future there is ever food shortages, or you have no money or you want to escape the control grid.

Hydroponics is definitely worth looking into.