Professor Papangelakis, in terms of the byproducts and wastes that are involved in mining and processing rare earth elements, my understanding is that thorium, which normally is produced in that process, is radioactive. Although it has a considerably shorter half-life than, say, uranium, it's still a challenge and an issue.
How much of a problem is it for the development of processing facilities here in Canada, and what research and development is being done to address this challenge?