Cross laminated timber or CLT, was developed in Austria in the 1990's as a structural wood building product engineered to replace steel and concrete in building construction.
What is CLT ? It is laminated sheets of wood glued together much like plywood only thicker and much stronger.
Why use CLT ? It is a renewal forest product which absorbs CO2 and can be recycled when its original purpose has been retired.
The New York Times reported on the background and use of CLT last week. Popular in Europe, in use in Austrialia, CLT is just starting to be recognized in the United States. Innovative Timber Solutions, LLC is marketing CLT products now in the US. Below is one of their instructive videos on how CLT is produced and can be used. It may be worth considering as a componant in your next project.