Eventually this is the type of low-imact house that Ken and Jen want to build themselves one day. To live a low-impact lifestyle is to live lightly on the earth.
In essence, this means to intelligently and intensively manage our surrounding environment in order to maximise return (in the forms of energy, water, food, shelter and products) and minimise waste (through recycling, composting and energy efficient systems).
In practice, this means to adopt a land-based, simple, localised lifestyle that works with the land and natural cycles available to us.
To learn more about permaculture visit this site: http://www.simondale.net/house/index.htm