Rain collects in two 2,600-gallon tanks nestled in the shade near the house and the water is channeled underground, via four-inch conduit, into the kitchen and bathrooms. Portable gas cylinders fuel the hot-water system and the cooking appliances. Bathroom and kitchen waste is collected underground and processed in a septic tank before being dispersed around the garden via a network of subterranean trenches. Rod Cooper, who designed this passive system, encouraged the Taits to plant native shrubs along the trenches, as the plants absorb the nutrients from the waste and the rest seeps into the earth or gets evaporated by the sun and wind.
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