That's a lot of wood. Click the pictures to get a better idea. Here's information on the construction of the building.
And from another source:
" The uniquely designed “wave panels” in the ceiling consist of a newly engineered composite wood panel made from B.C. mountain pine beetle kill wood, a timber that would otherwise be left to rot. "
"The oval is not merely the landmark venue of the Games, but also a representation of green design. As Vancouver is famous for its rainfall, much of the rainwater on the five and a half-acre roof of the building will be collected to supplement toilet flushing, while the rest will be directed into a scenic pond to be located on the east side of the facility. "
Because of this feature, signs have been installed directly above toilets in public restrooms:
Non-potable water. Do not drink.