Prefab housing isn’t what it used to be. While we typically think of cheap, low-quality mobile homes when think of prefabricated construction, the world’s top architects and engineers are looking to prefab housing as way to create sustainable urban environments. Since prefab housing is affordable, energy efficient, and incredibly quick-to-build, creative designers are hoping to bring this concept to skyscrapers. Next week in Seattle, Sustainable Living Innovations, a group made up of architectural design, construction, and engineering consultants, will unveil what they believe…