Throughout history people have been using earth to build spaces and create a sense of place. Earth is arguable the oldest building material in the history of mankind and even to this day approximately 1.7 billion people continue living in buildings made of earth. Earth is also the most abundant material available to us on the planet and the section of earth we use for construction is not detrimental to agricultural needs (we do not use topsoil).
Examples of earth construction can be found worldwide and in a variety of notably distinct techniques. These techniques have probably developed due to different soil qualities and climatic conditions as well as different technologies that were available to each distinct culture at the time of development.