The field of architecture is constantly evolving, and 2008 saw the emergence of several key design trends and themes. Some notable architectural styles and movements in 2008 include the continued popularity of sustainable and eco-friendly design, the use of computer-aided design software and advanced manufacturing techniques, and the growing interest in biomimicry, which involves using nature as a model for design. In addition, 2008 also saw the emergence of new materials and building technologies, such as 3D printing, and the increased use of composite materials.