Wood is a renewable resource.  Concrete and steel must be mined and are finite resources.

When comparing wood to concrete and steel, wood is the only resource that can be replaced faster than it is consumed.

More trees are growing in America's forests now than in the early 1900's.

Three million trees are planted every day.

One ton of timber creates one ton of oxygen and absorbs 1.4 tons of carbon dioxide.

Wood gives a lower carbon footprint to the end user than steel or concrete.