Wood has many attributes that make it an obvious choice for green building. It grows naturally, using energy from the sun, and is the only major building material that’s renewable and sustainable over the long term. It also outperforms steel and concrete when compared using life cycle assessment (LCA) methodology. LCA is an internationally recognized approach to evaluating materials, assemblies and even whole structures, over the course of their entire lives, based on measurable indicators of environmental impact. Using this method, study after study has shown that wood is better for the environment than steel or concrete in terms of:

• Global warming potential
• Resource use
• Embodied energy
• Air pollution
• Water pollution

Wood also contributes to a building’s energy efficiency and has an important role to play in the fight against climate change. While humans contribute carbon dioxide (CO₂) to the atmosphere by burning fossil fuels, growing trees absorb CO₂ and release clean oxygen. Some of the CO₂ is absorbed into the soil and the rest is stored in trees—and wood products made from trees—until they burn or biodegrade.