Sales benefit local economy and wildlife preservation.
Apparatus Architecture - design conventional, rammed earth and PISE structures in Northern California. California Institute of Earth Art and Architecture - CalEarth is an educational program of the Geltaftan Foundation dedicated to research and educating the public on environmentally oriented arts and architecture. The Australian Connection - an archive of questions with many photos and links. Comet Studios - architectural consortium specializing in environmentally conscious planning and design. Cob Cottage Company - conducting research and providing information on building cob structures.