Its unfortunate folks make claims based on self serving marketing messages.  The UBC project is a concrete core structure not a CLT project.  Almost all CLT projects need some form of subsidy, grant or award to be first cost competitive.  The real discussion and opportunity should be to design and construct buildings to get the most out of the materials used.  The best buildings and outcomes are a collaboration of materials.  It is well documented the true cost of ownership (85-90%) is in the operational or service life of the building in energy consumption and costs, maintenance, insurance against fire and other considerations, not in the upfront construction costs.   Reducing these emissions and costs is where the greatest contribution to sustainability and emission reductions are gained.   CLT is not approved by building, fire or seismic codes.  

Why is concrete, steel and masonry used in high impact transportation and infrastructure projects.... Durability, resiliency, strength.