An idea.

Because of my passion for this issue, I want to tell everyone I can. I've found that, instead of making a statement to people like this:

"Silver fillings contain mercury and can be bad for your health."

I've found this approach to get a much better response:

"Haven't you heard? Those silver fillings dentists use contain up to 50% mercury which leaks out 24/7. Oh, yea; A lot of people are hearing about all the health issues this can cause."

Including the fact that a lot of people are doing something that they might be missing out on (exemplified by asking "Haven't you heard?") really gets their attention.

If you consider that people have to hear something 3 to 7 times before they consider it credible, this approach may count for 2 or 3 points.

Just a thought to help get the word out.