Yes, there are quite a few. I'll mention gallium and germanium because these are things that China has put export restrictions on recently. They are by-products of things we produce.
If you didn't know—and I think we all know—we are big aluminum producers. Gallium is a by-product of that, and the market for gallium wasn't very good. China kept prices very low. There was no incentive for anyone to turn that into a product, so China developed an almost complete monopoly on gallium. Again, the market is very small and niche. It's not a lot of money, but you still need that for components to make things.
It's the same with germanium. It's a by-product of zinc refining, which we do in Trail, B.C. Again, the market was so small that there wasn't a lot of private sector incentive to compete with China on it.
It won't take a lot for Canada to develop the things we already have and to develop a tack to start processing them so that we can use them in our own supply chains.