Resources General Kukreja, Rinkesh. “What is a Earthship?” Conserve Energy Future 2017. Web. Elizabeth R. Purdy. "Earthship", Encyclopædia Britannica, inc. 2017. Web. Water Wise Group. "Greywater Education", Water Wise Group, Inc. Web. Design and Construction Reynolds, Michael. “Design Principles.” EarthshipGlobal, Earthship Biotecture 2016. Web. Building Codes “Permits, Codes & Regulations,” Permits, Pangea Builders