Used to make the structures that we live in, wood is composed of cellulose, which is pertinent to proper digestion. Wood is an important natural resource, and reduces a significant amount of energy used compared to the vast majority of all other building materials. Additionally, it produces a low carbon footprint and is renewable. Cellulose is also a major component to digesting. It is part of a dietary fiber that is known to be essential for proper digestion. Cellulose exists in all green plants, and is important to the very survival of all plant life.