Thank you.
I'll go to Ms. Laurie-Lean.
This kind of follows on the idea of substitution. I know that copper, for example, has recently been substituted for pressure-treated material in wood, so there's a new type of pressure-treated wood that's coming out that is copper-based. Can you talk about the role copper is playing? Your handout has a lot of examples of what we use copper in, but is copper being used more frequently and being substituted for other chemicals?