Green port-a-potties. During construction, workers are using composting toilets in place of the familiar, chemically smelly portable toilets. Essentially, their waste is being allowed to do what waste was meant to do: mix with other decaying biological products and create nutrient-rich soil. After workers make their “deposits,” the solid waste is channeled into a container half full of saw dust and worms: industrious and conscientious workers who quickly go to work turning the waste into composted soil. The water of urine is evaporated away, leaving only the faintest film of biological material. (Hope you weren’t eating lunch!) In addition to being more efficient, the toilets are smaller and easier to move than large chemical portable toilets: an important consideration when your workers need to answer nature’s call more than 1,500 feet off the ground. Once human waste – both of the liquid and solid variety – is fully processed, more than 90 percent of it is re-used, eliminating the need to constantly empty and re-plenish the water in traditional portable toilets. Workers have praised the system as far superior and less stinky to other high-rise bathroom arrangements.

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Check out the World Toilet Summit

This house really leaves a small foot print; 10 x 10 ft to be precise and it includes a composting toilet, of course!

Check out the Cube project at http://www.cubeproject.org.uk/