“What goes up must come down.” So goes Newton’s law, and so goes the law in more than a dozen U.S. states when it comes to end-of-life disposal of mercury-containing thermostats.
More specifically, it’s down from the wall and into proper recycling facilities. But actually finding the mercury-containing culprits can be a bit of a riddle, partly because there’s no way to know exactly how many are still out there or where they are located.