TreeHugger founder Graham Hill demonstrates how a simple studio apartment can, through the aid of sliding walls and collapsible furniture, function as an eight-room dwelling with a guest room and full size table.

Given the challenges of metro living, Hill explains that apartment setups, like the one featured above, is "good for the environment. It's also really good for their pocketbook."

Cheap and eco-friendly is quite a mashup, and Hill's apartment, modeled from Romanian architecture student submissions, is presented like a magician's show.

The homeowner's bed folds out over the living room couch, and two guest bunk-beds emerge from behind a sliding wall. He pulls a table from under the kitchen counter that stretches to seat ten. The stove burners emerge from a drawer on one side of the kitchen; and on the other are drawers that function as refrigerator and freezer spaces.

True to the eco-friendly marketing, the apartment also features a dishwasher that operates on a third of the water that it takes to run a conventional machine. Another feature is an electronic composter.

In today's tight economy, apartment set-ups like Hill's might prove functional for the future.