My Dr tested me for heavy metals and the test came back with elevated mercury and lead. I had no idea how it happened.
Then, I was driving in my SUV listening to Rush and caught the tail end of someone telling how they, and their co-worker got very sick trying to clean up a broken fluorescent bulb(s). That was my "ah-ha" moment.
I didn't know about the mercury content of the long fluorescent tubes and they didn't fit into my city trash can that had to be closed for pickup (drivers took notes). So, I'd pop them. It was a pretty cool sound too. I wouldn't hang around to sniff the fumes, but I'm sure this little bit of occasional exposure is what put my mercury levels over the top.
Trust me, the manifold health issues are not fun. I'm told they can be reversed over time, but not always for kids.