I can start.
We talk about mass timber; it's something we've specialized in, but we see a lot of other products in steel and concrete that are coming forward that are really providing good solutions as well. And now we're looking at combining them all and making these hybrid structures.
If we want to talk specifically about timber, I think we have dispelled a lot of these myths. If you want to talk about fire, we have excellent fire engineering that happens now, which just didn't exist before. But we have existing over a hundred-year-old buildings. One of my office buildings we're in is just over 100 years old, and it's all timber. It's nail-laminated timber, which has worked just fine all of these years, but we went away from it. Now it's a renaissance and we're coming back to it. But when they built those, they didn't have the same technologies we do now. We talk about encapsulation. We have active fire sprinkler systems and other technologies. That part of it, I'm comfortable with. That's where a lot of the research and energy has gone into developing it.
As for the other items, yes, we are always concerned about moisture during construction, but that's also countered by our surrounding the building and closing it in it rains during construction. Let's close it in faster. These prefabricated systems actually address that because the buildings go together so much faster.
And I'm sorry, were there other—