Earthen building uses natural materials like mud, straw, and bamboo as building materials. Traditional earthen construction techniques have been used for shelter in places like Yemen, Taos New Mexico, and Wualate. Approximately one third of the world's population lives in earthen homes. The earthen building movement promotes these traditional methods as a renewable and affordable building solution. The process involves mixing mud with materials like rice husks or straw, forming adobe bricks, and stacking them to form walls. Various finishing techniques like plasters, paints and roofing materials are then used to complete earthen structures. Examples of finished earthen buildings from around the world demonstrate its design possibilities.