Earthbag Construction: One of the most practical structures is a multi-purpose structure that can serve as emergency shelters, temporary or permanent housing, root cellars or any conceivable structure.
Earthbag construction is an inexpensive method to create structures which are both strong and can be quickly built. It is a natural building technique that evolved from historic military bunker construction techniques and temporary flood control dike building methods. The technique requires very basic construction skills and materials: sturdy sacks, materials usually available on site (such as sand, gravel, clay or crushed volcanic rock). Walls are gradually built up by laying the bags in courses forming a staggered pattern similar to bricklaying. The walls are almost always curved to provide improved lateral stability, forming round rooms and domed ceilings like an igloo. Skills you learn will serve you well no matter the structure you plan to build
“Earthbag Building Guide” book and DVD by Dr. Owen Geiger included.