What is the best way to build a low-cost home that doesn’t harm the planet? Most materials such as concrete and steel are highly processed and transported long distances, making them unaffordable to millions who are in need of housing. These high-tech materials also cause a great deal of harm to the environment. The answer is to utilize locally available, low-impact natural building materials such as earth, stone, straw and small diameter wood. This article explores several methods of using earth and sustainably harvested wood to cut housing costs to rock-bottom prices. And because the techniques are user-friendly, they are ideal for do-it-yourselfers.