Over a billion people in the world lack decent housing even though there are dozens of low cost housing methods that could eliminate this problem. Possibilities include building with earthbags, adobe, cob, pallets, bamboo and other locally available materials. These affordable, sustainable housing options are described on our blog in good detail. Additionally, the Internet has thousands of websites, blogs, online journals and forums with even more information about these building methods. There are thousands of low income housing groups working on this cause. And, there doesn’t seem to be a shortage of information on how to build affordable housing, and yet the lack of decent housing persists. So what’s going on? What’s the real problem here?