Definitely. Even though we call mercury a legacy, it's still ongoing. The major sources have been placed under control, but, yes, mercury continues to be used in certain applications.
With the new international treaty called Minamata Convention on Mercury, which Canada signed on to, there is a plan; there are limitations on how those practices can continue. I would say that, with time, as the convention starts to be more enforced, the application of mercury in dental practice, in thermostats and so on, should become less and less.
However, the challenge with mercury is that, even though it may be a very small amount that is used in dental practice, it doesn't take much for mercury to actually have a major impact. To some extent it's very similar to what we talked about with PFAS earlier and about which amount of it is safe. With contaminants like mercury, it's very difficult to prescribe a number for a guideline in water because this contaminant biomagnifies. Even though the concentration in water could be extremely low, by the time it gets accumulated in fish and in humans, the concentration could be high enough.