Develop home recycling machine that breaks things down for use in a 3D printer.
You put your paper products in one part, plastics in another, food stuff in another, glass in another. The machine would break things down to a point where they could be used in an attached 3D printer to make other items you could use or sell.
Food waste could be processed into liquid fertilizer sludge that could be used to grow food.
This could be a boon to m preppers that want to go off the grid but have all the comforts of modern technology.
