The Global Earthship design performs in almost any climate around the world. The main features of this design include a double layer of glass (“double greenhouse”) between the inner living spaces and the outside and the use of underground cooling tubes and convection skylights which work together to provide ventilation and natural air conditioning for the building. Global Model Earthships have been built in France, Germany, Mexico, Canada and across the United States. “Off-the-rack” construction drawings are available for purchase and range in size from studio to three bedrooms. Visitors to the Greater World Community can rent one of these model homes for the night and experience how comfortable it is to live in an autonomous home.