SSA also sells systems packages that contain preassembled components for the water purification, hot-water and solar electric systemsall contained neatly in a 5x8 foot crate that is simply installed on the front of the earthship. They then just need to be connected to the appropriate pipes and wires. The various modules designed by Reynolds and his colleagues for both building and services are appropriate for many kinds of remodelling and retrofit. As with any type of building, there are possible disadvantages and dangers with earthships, and some arise from the very ambitiousness of their design. Earthships have,