Someone Must have read Red Mars by Kim Stanley Robinson.
Tomatoes, Melons, Cucumbers Grown
on Thin Films
Who needs soil when you can grow crops on film? Japan's Mebiol is growing a Garden of Eden of sorts on its thin hydro-membranes, which are only microns thick.
As the vid below shows, the firm's Integrated Membrane Culture, or IMEC (PDF), is a technology for farming using a substrate that's made from hydrogels. No soil is needed, as the plants absorb water and nutrients from the film.