Embodied energy refers to how much energy it takes to make a building material, the energy required to transport the material, and where the material goes at the end of its life. It is a principle considered when building an environmentally friendly home. For example, bamboo is considered a good renewable resource because it is a grass that can be grown quickly and easily. However, bamboo has embodied energy issues as much energy is needed to process it in factories. Bamboo is also typically grown in Asia so more energy is spent transporting it to other countries.